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10372 discussions

Re: [ALUG] Recovering a NAS
by Noel Galer 27 Sep '16

27 Sep '16

>-----Original Message----- >From: main [mailto:main-bounces@lists.alug.org.uk] On Behalf Of Chris >Walker >Sent: Tuesday, September 27, 2016 10:10 AM >To: main(a)lists.alug.org.uk >Subject: [ALUG] Recovering a NAS > >In 2009 I bought an Edimax NAS from Scan.co.uk and it's worked fine >since, albeit with a change of hard drives. > >However over the weekend it wouldn't power up cleanly. Neither of the >hard drive lights would come on and it wouldn't come ready. I also >couldn't communicate with it in any way. > >I got in touch with Edimax and they suggested doing a reset on it. That >at least allowed me to communicate with it and it came ready, but it >said that the discs weren't installed correctly although it did show >the partitions. > >I removed both drives (WD 1TB Red drives in RAID1) and using mdadm, I >can see the contents of disc 1 and it all looks ok. > >If I buy another NAS box, is there any way I can simply put these >drives in it and expect it to work, or should I expect the new box to >have a different arrangement somehow of formatting? > >What I'm seeking to avoid is loads of copying and moving of files. > >Are there any recommendations from people here as to a small (I don't >want huge amounts of storage and I power off the box when not used) NAS? > >-- > __ __| |_ __ __ .----------------------------------------------. >/ _/ _` \ V V / | mailto:alug_cdw@the-walker-household.co.uk | >\__\__,_|\_/\_/ |______________________________________________| > > I think as you suggest, any other NAS enclosure would likely have a different setup and the disks would not just transfer across. It is my understanding that much of a RAID drives configuration is actually on the drive itself with only some of it in the controller. Personally I would look on eBay and try to locate an identical unit which I would expect to 'just work'. However, if the worst comes to the worst and you are forced to copy huge tranches of files and are looking for a way to feel sure that the source and destination might actually match, plus you can put up with using Windows for a while ( assuming your disk formats are compatible ), I would thoroughly recommend trying a fabulous tool that must have been designed with us in mind. It is called 'Beyond Compare' by Scooter Software and I have been using it every day for over a decade. You can easily see what is on the source and destination disks side by side and copy all or part of you disk, at once or in recoverable stages and even compare multiple files and folders byte by byte to ensure all is well. See here :- http://www.scootersoftware.com/ Good luck, Noel ( Xorsyst ) _______________________________________________ main(a)lists.alug.org.uk http://www.alug.org.uk/ https://lists.alug.org.uk/mailman/listinfo/main Unsubscribe? See message headers or the web site above!

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Transferring servers
by steve-ALUG＠hst.me.uk 20 Sep '16

20 Sep '16

Hi, My in-home server is at the end of it's tether, and I need to move to new hardware (motherboard, psu, case, fans etc) before the old one finally fails. This is a very stupid question. Under windows, in days of old (win 95, 98, xp for instance), I've had some success in the past, with just transferring hard disks into the new machine, and then installing relevant drivers. Would this work under linux? (I'm running xubuntu) If not, what's the best way to go? Installing the same version of xubuntu on the new machine with the same packages as the old one, then copying the data and config files, or copying everything from the old machine and then booting from a live cd and installing from there over the top of the transferred data, then tweaking or restoring the customised config files, or something else? I'm currently raided (Raid 1, 2 disks mirrored). Presumably I should do this again? I have a / and a home partition. Again, should I stick with this? Should I be using LVM (Logical Volume Management)? If so, how can I do it with RAID? Any/all advice gratefully received! Steve

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Linux magazines
by Mark Rogers 20 Sep '16

20 Sep '16

I have various Linux magazines going back over several years that are taking up space. I'm tempted to keep them as an interesting archive of how things have progressed, but I'm also thinking of letting some/all go to recover some room on the bookshelf. Is there any interest here if I decide to let them go? If there's interest I can get some kind of list together, but over the years I've tended to subscribe to most Linux magazines (although not necessarily kept them all). It's unlikely I've still got many cover CD/DVDs. -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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Intltool install fails
by Chris Walker 11 Sep '16

11 Sep '16

I'm trying to install intltool in order that i can run Asunder - a CD ripping tool - but it's failing. There are lots of errors all along the same lines (all python related). Here's the first :- file /usr/share/glib-2.0/codegen/__init__.pyo from install of lib64glib2.0-devel-2.48.2-1.mga6.x86_64 conflicts with file from package libglib2.0-devel-2.48.2-1.mga6.i586 If both the i586 and x86_64 versions are the same, where is there a conflict and is there any way for me to resolve it? -- __ __| |_ __ __ .----------------------------------------------. / _/ _` \ V V / | mailto:alug_cdw@the-walker-household.co.uk | \__\__,_|\_/\_/ |______________________________________________|

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[ALUG Announce] ALUG Norwich Pub Meet Thursday 8th September
by Viperfang 05 Sep '16

05 Sep '16

ALUG Announce Please send announcements to Announce(a)lists.alug.org.uk Unsub, change settings via https://lists.alug.org.uk/mailman/listinfo/announce ----- Hello Norwich Aluggers, Our monthly ALUG Norwich social meeting will be held this Thursday, 8th September at The Coach and Horses (82 Thorpe Road, Norwich, NR1 1BA). The meeting officially starts at 8pm, although some people may arrive earlier. More information on those people can be found on the list and the IRC channel. If you are unsure if you will recognise us then make yourself and your intent to attend known by either posting on list or visiting us on IRC so we can look out for you rather than hiding in the corner. Optionally you could ask at the bar if they know where the geeky computer weirdos are and they'll point you in the right direction (seriously!). Another possibility is look for heaps of electronics on a table that may possibly look like movie props that would used for detonating explosives. Feel free to bring electronics/laptops/gadgets to the meet, you will by no means be alone. Ben Bewick aka Viperfang NB: This mail is automated, please refer to the usual sources for more information. ALUG Contact Details: Website : http://www.alug.org.uk/ IRC : #alug on irc.alug.org.uk List : http://lists.alug.org.uk/mailman/listinfo Twitter : http://twitter.com/anglianlug Identica: TBA Facebook: http://www.facebook.com/group.php?gid=2381613902 ----- Send discussion replies to main(a)lists.alug.org.uk (Reply-To set) Unsub, change settings via https://lists.alug.org.uk/mailman/listinfo/announce

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Re: [ALUG] System battery low
by Bev Nicolson 02 Sep '16

02 Sep '16

Are these instructions ok? http://www.wikihow.com/Replace-the-Battery-in-Your-PC That's the kind of info I'd need. Step by step with pics if possible! Bev. On 01/09/16 11:03, Noel Galer wrote: > This seems to be simply a matter of the CMOS battery on the motherboard that maintains the NVRAM / BIOS settings running low. The matter of surge suppressors seems to be a red herring as the date of that thread is 2003. However, something seemed to be causing corruption of the CMOS, since a simple removal and replacement would not otherwise have cleared it permanently if the battery was actually low. Although probably not caused by a surge suppressor in your case, the CMOS could still be corrupted and removal / replacement / noting settings and reloading them might still work. However, the battery is probably near the end of it's life anyway and they are about £1 to buy. As an engineer I would have no issue changing the battery but can understand that others may be reluctant to do so. There therefore seems to be two choices for you, take it to a shop and pay for the battery to be replaced specifying clearly that they record the settings, clear the CMOS and restore settings again afterwards. Or do it yourself. If you decide to do this, I recommend using a loop of 'Sellotape' firmly stuck to the flat top of the battery before removal, this is for you to hold whilst releasing the clip that secures the battery. This will help prevent the battery slipping out of your hand and landing across exposed conductors / components, which if there is any life in the battery, could otherwise damage the motherboard. > > Best regards, > > Noel > > Noel Galer > > -----Original Message----- > From: main [mailto:main-bounces@lists.alug.org.uk] On Behalf Of Bev Nicolson > Sent: 01 September 2016 09:00 > To: ALUG > Subject: Re: [ALUG] System battery low > > On 01/09/16 08:38, Bev Nicolson wrote: >> That's the alert I just got on my Dell. I have googled but to be >> honest, I'm not confident about fixing this. The advice 'dhg' got here >> from Dell seems the one to go for but how do I do that? >> >> >> http://en.community.dell.com/support-forums/desktop/f/3514/t/1915445 >> >> >> Bev. >> > Not a laptop, btw. Dell Optiplex 745 should that make any difference. > Ubuntu 14.04LTS with all updates installed. > > Bev. > > > > _______________________________________________ > main(a)lists.alug.org.uk > http://www.alug.org.uk/ > https://lists.alug.org.uk/mailman/listinfo/main > Unsubscribe? See message headers or the web site above! >

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System battery low
by Bev Nicolson 01 Sep '16

01 Sep '16

That's the alert I just got on my Dell. I have googled but to be honest, I'm not confident about fixing this. The advice 'dhg' got here from Dell seems the one to go for but how do I do that? http://en.community.dell.com/support-forums/desktop/f/3514/t/1915445 Bev.

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2600 meeting at 18:00 on Friday the 2nd September.
by Viperfang 30 Aug '16

30 Aug '16

Quick heads up about this months Norwich 2600 meeting, more info at http://www.norwich2600.co.uk

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Tablet that runs Linux - are there any?
by Chris Green 27 Aug '16

27 Aug '16

I'm getting totally fed up with trying to use Android tablets to do anything remotely useful, they're full of junk software you can't get rid of and you can't access the parts you want. So, can one get a tablet (7" or maybe up to 9") that runs some vaguely normal version of Linux? -- Chris Green

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Re: [ALUG] main Digest, Vol 134, Issue 8 - linux tablets
by PB 25 Aug '16

25 Aug '16

I have tried to install Linux on a Linx 8. One of the problems is that you have 32bit EFI and a 64bit processor. The processor is an Atom. So you can't get it to boot a normal 64bit distro. This means either using bootia32.efi, which defeated me, or finding an EFI based 32 bit distribution. The only one I've heard of is Sparky Linux. That did at least start booting, but the display just went blank when it tried to load X. Maybe the bigger Linx will work better. I have given up on the 8 inch one. I also tried to install Debian on the Nook, and the package seemed to go in fine, but I have not managed to get Debian to boot and work normally.... P

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Is there any easy way to view mounted 'real' disk drives?
by Chris Green 24 Aug '16

24 Aug '16

Once upon a time you could use the command 'mount' to see what filesystems were mounted but it has now got so cluttered with 'virtual' filesystems that it's pretty useless. What's an easy way of seeing what actual, data containing, useful filesystems are mounted? I.e. the physical disks and the NFS ones. -- Chris Green

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Slow 8TB drive
by Mark Rogers 14 Aug '16

14 Aug '16

I have a new 8TB Seagate drive, extracted from a USB3 "Backup Plus" drive and installed on a SATA3 connector. It has a single partition on it. The actual disk is a "ST8000AS0002-1NA17Z" which is an archive drive so I'm not expecting stellar performance, but even so it feels very slow. For example, running up a Windows VirtualBox VM from that disk feels like it's being dragged through treacle (the host PC is an i7-6700k with 32GB RAM so it should run comfortably). I'd speculate I may have poor disk alignment but I don't know how to check; the results of Googling got me to sudo parted /dev/sda "align-check optimal 1" which reports "1 aligned". Am I just pushing the drive in a direction it doesn't want to go? Would it actually perform better if returned to the USB3 case? It seems unlikely but then maybe Seagate hobble the drives for direct SATA to discourage them being taken out? I book from SSD and the purpose of the drive is actually archiving anyway (the VM on it was only there temporarily) so if it's just how it's supposed to be then I'll live with it. -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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OT MP3 files problem
by Bev Nicolson 02 Aug '16

02 Aug '16

This might be a bit off topic but I can’t think who else to ask. (If you can, let me know.) The problem is that my MP3 player (a Philips GoGear with 4GB memory if that makes any odds) has two mp3's files on it with the wrong name. Fine, rename them, you cry. But there's the rub. They show with the right name if I mount it. What can I do? It isn't full, by the way. Bev

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2600 meeting at 18:00 on Friday the 5th August.
by Viperfang 02 Aug '16

02 Aug '16

Quick heads up about this months Norwich 2600 meeting, more info at http://www.norwich2600.co.uk

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Re: [ALUG] Debian audio problem
by Phil Ashby 27 Jul '16

27 Jul '16

https://wiki.debian.org/SoundConfiguration On 27/07/16 11:48 Barry Samuels <bjsamuels@...org.uk> wrote > > I'm running Debian Testing, up to date as of today, and for a few months > now have had no audio. I used to have sound both on the desktop and in the > browser then I lost sound in the browser and finally in the desktop. > > I suspect that an upgrade somewhere along the way has caused this but I > don't know what and I haven't been able to cure it. > > [ALSA works on known hardware if used directly] > > So that means I have exhausted my knowledge of Linux and audio and I still > don't have any sound. Any suggestions would be gratefully received. > Hi Barry, Are you running PulseAudio as part of your desktop installation? I had a similar failure (HDMI ports not showing up in audio output options) that turned out to be the wrong audio device detection module in use. Specifically, in /etc/pulse/default.pa the following was commented out: ### Automatically load driver modules depending on the hardware available #.ifexists module-udev-detect.so #load-module module-udev-detect #.else ### Use the static hardware detection module (for systems that lack udev support) load-module module-detect #.endif so pulse was using module-detect which is obsolete and broken. Uncommenting the udev module sorted me out: ### Automatically load driver modules depending on the hardware available .ifexists module-udev-detect.so load-module module-udev-detect .else ### Use the static hardware detection module (for systems that lack udev support) load-module module-detect .endif Cheers, Phil.

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Debian audio problem
by Barry Samuels 27 Jul '16

27 Jul '16

I'm running Debian Testing, up to date as of today, and for a few months now have had no audio. I used to have sound both on the desktop and in the browser then I lost sound in the browser and finally in the desktop. I suspect that an upgrade somewhere along the way has caused this but I don't know what and I haven't been able to cure it. aplay -l gives me: **** List of PLAYBACK Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: ALC1150 Analog [ALC1150 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 1: ALC1150 Digital [ALC1150 Digital] Subdevices: 1/1 Subdevice #0: subdevice #0 card 3: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 3: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1] Subdevices: 1/1 Subdevice #0: subdevice #0 card 3: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2] Subdevices: 1/1 Subdevice #0: subdevice #0 My monitor has built-in speakers and uses an HDMI connection so card 3 should be the one to use. This actually produces the intended sound: aplay -D plughw:3,3 /usr/share/sounds/alsa/Front_Center.wav Putting those results into /etc/asound.conf as under: pcm.!default { type plug slave { pcm "hw:3,3" } } ctl.!default { type hw card 3 } produces no sound. If I boot from a live Kubuntu distro I get sound on the desktop but not in a browser. So that means I have exhausted my knowledge of Linux and audio and I still don't have any sound. Any suggestions would be gratefully received. -- Barry Samuels http://www.beenthere-donethat.org.uk The Unofficial Guide to Great Britain

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IMAP (Gmail) archiving
by Mark Rogers 27 Jul '16

27 Jul '16

A quick Google suggests there are lots of ways to archive IMAP accounts so I thought I'd see if anyone here has any recommendations. Specifically: I have a handful of Gmail accounts which I'd like to archive (by which I mean keep permanent accessible backups offline). I'd like the archive to be viewable with a GUI mail client like Thunderbird. I'd like support for OAuth2 authentication if possible. I'd also like anecdotes from anyone who's tried this. I can see conflicts between me deleting spam or other rubbish at the "live" end that I would also want deleted from the archive, for example, but also accidental deletions (or deletions of old emails to save space) at the live end that I would not want removed from the archive. -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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Re: [ALUG] Anyone know how to use gpg-zip?
by Ewan Slater 14 Jul '16

14 Jul '16

> I want an encrypted archive that uses the passphrase I give when encrypting and requires the > passphrase again to decrypt it. What about 7zip easy, AES-256 symmetric encryption (see below): Cheers, Ewan ***create file*** ewans@chatterbox:~/Downloads$ 7z a -p commentary.7z commentary.txt 7-Zip [64] 9.20 Copyright (c) 1999-2010 Igor Pavlov 2010-11-18 p7zip Version 9.20 (locale=en_GB.utf8,Utf16=on,HugeFiles=on,1 CPU) Scanning Creating archive commentary.7z Enter password (will not be echoed) : Verify password (will not be echoed) : Compressing commentary.txt Everything is Ok ***bad password*** ewans@chatterbox:~/Downloads$ 7z e commentary.7z 7-Zip [64] 9.20 Copyright (c) 1999-2010 Igor Pavlov 2010-11-18 p7zip Version 9.20 (locale=en_GB.utf8,Utf16=on,HugeFiles=on,1 CPU) Processing archive: commentary.7z Enter password (will not be echoed) : Extracting commentary.txt Data Error in encrypted file. Wrong password? Sub items Errors: 1 ***good password*** ewans@chatterbox:~/Downloads$ 7z e commentary.7z 7-Zip [64] 9.20 Copyright (c) 1999-2010 Igor Pavlov 2010-11-18 p7zip Version 9.20 (locale=en_GB.utf8,Utf16=on,HugeFiles=on,1 CPU) Processing archive: commentary.7z Enter password (will not be echoed) : Extracting commentary.txt Everything is Ok Size: 40193 Compressed: 9539

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Anyone know how to use gpg-zip?
by Chris Green 14 Jul '16

14 Jul '16

I'm trying to create an encrypted archive of some files in a ditrectory. It seems like gpg-zip should do what I want but I can't get it to do simple symmetric encryption. The trouble is that even though I'm specifying --symmetric gpg-zip still insists on being given a user:- chris@esprimo$ gpg-zip --encrypt --symmetric --output fred glomtest Enter passphrase: Repeat passphrase: You did not specify a user ID. (you may use "-r") Current recipients: Enter the user ID. End with an empty line: chris Current recipients: 2048g/8FC95300 2015-10-05 "chris <chris@esprimo>" Enter the user ID. End with an empty line: File `fred' exists. Overwrite? (y/N) y I can then just decrypt the archive with:- gpg-zip --decrypt fred no need for the passphrase! That's useless for what I want. I want an encrypted archive that uses the passphrase I give when encrypting and requires the passphrase again to decrypt it. Otherwise anyone walking up to my computer when it's turned on (and I'm logged in) can decrypt the archive. Can gpg-zip do what I want and, if so, how? Otherwise what are the alternatives? -- Chris Green

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Lubuntu install
by Chris Walker 12 Jul '16

12 Jul '16

I have a Pentium machine here and I'm trying to install Lubuntu on it but without success. I've looked at this page - https://wiki.ubuntu.com/Lubuntu/AdvancedMethods and have added the -- forecepae command to the end of the command string but all I get is a cursor in the top left of the screen and nothing else happens. I've had other distros working on the machine - I installed MX last week - but thought I'd have a play with something else but I'm not having any success. What's the remedy here? -- __ __| |_ __ __ .----------------------------------------------. / _/ _` \ V V / | mailto:alug_cdw@the-walker-household.co.uk | \__\__,_|\_/\_/ |______________________________________________|

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[ALUG Announce] ALUG Norwich Pub Meet Thursday 14th July
by Viperfang 11 Jul '16

11 Jul '16

ALUG Announce Please send announcements to Announce(a)lists.alug.org.uk Unsub, change settings via http://lists.alug.org.uk/mailman/listinfo/announce ----- Hello Norwich Aluggers, Our monthly ALUG Norwich social meeting will be held this Thursday, 14th July at The Coach and Horses (82 Thorpe Road, Norwich, NR1 1BA). The meeting officially starts at 8pm, although some people may arrive earlier. More information on those people can be found on the list and the IRC channel. If you are unsure if you will recognise us then make yourself and your intent to attend known by either posting on list or visiting us on IRC so we can look out for you rather than hiding in the corner. Optionally you could ask at the bar if they know where the geeky computer weirdos are and they'll point you in the right direction (seriously!). Another possibility is look for heaps of electronics on a table that may possibly look like movie props that would used for detonating explosives. Feel free to bring electronics/laptops/gadgets to the meet, you will by no means be alone. Ben Bewick aka Viperfang NB: This mail is automated, please refer to the usual sources for more information. ALUG Contact Details: Website : http://www.alug.org.uk/ IRC : #alug on irc.alug.org.uk List : http://lists.alug.org.uk/mailman/listinfo Twitter : http://twitter.com/anglianlug Identica: TBA Facebook: http://www.facebook.com/group.php?gid=2381613902 ----- Send discussion replies to main(a)lists.alug.org.uk (Reply-To set) Unsub, change settings via http://lists.alug.org.uk/mailman/listinfo/announce

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Search all text files for a text string
by Mark Rogers 09 Jul '16

09 Jul '16

Is there a quick way to search all text files for a string? By "text file" I mean ASCII files, like log files, config files etc, but excluding binaries like executables, database files, etc? What I want is something like: find / -type a -exec grep 192.168.100.1 \{\} \; .. or similar, except that I made up "-type a" for ascii. (I'm trying to find all places that an IP address is mentioned so that I can change ones that need to be changed.) -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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DD LUKS USB Drive
by steve-ALUG＠hst.me.uk 06 Jul '16

06 Jul '16

Hi Clever People! I have a USB drive that's encryped and mounted using LUKS. It's used to hold backups (using backuppc and another backup system). This drive appears to be a bit flaky so I'm going to have to replace it. My silly question is, if I use dd to copy the entire contents from the old disk to the new one, am I going to be able to mount the new one via LUKS and it be able to access the data or is there some hidden gotcha that will prevent this from working? Cheers Steve

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MicroSD card read issues
by Mark Rogers 30 Jun '16

30 Jun '16

Can anyone shed light on what the following entries in /var/log/syslog actually mean? Jun 16 11:43:45 mark-pc kernel: [92204.212656] sd 11:0:0:2: [sdf] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_SENSE Jun 16 11:43:45 mark-pc kernel: [92204.212669] sd 11:0:0:2: [sdf] tag#0 Sense Key : Hardware Error [current] Jun 16 11:43:45 mark-pc kernel: [92204.212675] sd 11:0:0:2: [sdf] tag#0 Add. Sense: No additional sense information Jun 16 11:43:45 mark-pc kernel: [92204.212683] sd 11:0:0:2: [sdf] tag#0 CDB: Read(10) 28 00 06 87 47 30 00 00 08 00 Jun 16 11:43:45 mark-pc kernel: [92204.212688] blk_update_request: I/O error, dev sdf, sector 109528880 Jun 16 11:43:45 mark-pc kernel: [92204.212696] Buffer I/O error on dev sdf1, logical block 13690854, async page read Background: This a pretty new Sandisk [1] 128GB MicroSD (UHS) card, taken out of my phone and plugged into my PC via a card reader (USB2). A previous card caused issues in my phone so I replaced it with this one, and it now is not behaving well (usually OK but sometimes if I try to look at photos on the card the phone will lock up temporarily). I'm trying to back everything up onto my PC so I can copy it across onto a Samsung card to see if that's better. The above errors crop up periodically in syslog whilst copying. Is the issue the card, the card reader, the PC, the drivers, ...? [1] I believe it to be genuine Sandisk, it was purchased from Amazon. Advice on how to verify it's not a fake welcomed! -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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Raid10 degraded
by John Cohen 30 Jun '16

30 Jun '16

I have a small server Thinkserver ts140 for serving files via sftp to my colleagues, as well as a few other services. I run ubuntu 14.04 from a 500gig drive backed up nightly offsite, and have a separate raid10 array 4x 4TB (WD Reds) for the storage. They've been running fine for over a year until yesterday, when I received an email saying the array was degraded. " A DegradedArray event had been detected on md device /dev/md/0. P.S. The /proc/mdstat file currently contains the following: Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid10 sdb1[0] sde1[3] sdc1[4] 7813772288 blocks super 1.2 512K chunks 2 near-copies [4/3] [UU_U] unused devices: <none>" First thing I did was backup the most important files to an external drive via rsync. (I have run out of space for a full 8TB external drive backup and can't afford to buy any more drives just now) We also keep these more important files offsite) mdadm -D /dev/md0 shows that my third drive sdd1 was removed. I checked the smart tools to see if the drive was failing and saw nothing, even after running a self-test. I didn't check for disk errors on the drive itself as I'm not sure how this works in a raid setup. I did try re-adding the disk to the raid and it immediately picked it up and started recovering. This was the mdadm --examine shows of the raid status *before* I tried re-adding the removed drive: http://pastebin.com/P4Q4YhN7 I can't see anything wrong here, the only difference I saw was in the sdd section showing Array State AAAA instead of AA.A as the others were (. = missing) This morning I woke up to another email with the same message, and the disk sdd1 was removed again. I am adding the drive again to see what happens, but suspect the same results. Here's the mdadm --detail now: http://pastebin.com/CkBm6SbH dmesg since a recent reboot, with a lot of the repeats taken out: http://pastebin.com/jzWnYizV 1) Should I run any more tests on the drive itself? Any specific suggestions? Do you think it could be a hardware fault unrelated to the actual drive? I'm nervous of starting to swap things around to test this. 2) The drives are in warranty so I have contacted WD to ask for a replacement, although if the SMART tests don't show anything I don't know if they'll replace the drive 3) Should I tell my colleagues we're going to have to switch the machine off until the new drive arrives? (I am paranoid of a second drive failing before I get a new one) Any advice as to what I could do to test the drive/setup is appreciated. Please be aware I'm no linux guru, my field is in something completely different and I just happen to love learning about linux and have found it very useful to complement my office setup and work. Many thanks John

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