I have been looking at reducing my system's boot-up time and noticed that it seemed to spend quite a lot of time detecting a device called /dev/sdc.
I only have two real hard disks on the system, they're /dev/sda and /dev/sdb. However in dmesg I see:-
[ 7.681894] usb-storage: device scan complete [ 7.690995] scsi 6:0:0:0: Direct-Access Generic Ultra HS-SD/MMC 1.82 PQ: 0 ANSI: 0 [ 7.691402] sd 6:0:0:0: Attached scsi generic sg3 type 0 [ 7.707729] sd 6:0:0:0: [sdc] Attached SCSI removable disk
What is this? I don't have any removable disks that I know about and /dev/sdc doesn't seem to be in any way a usable device. The only USB devices (well, external ones anyway) are a mouse and a scanner.
I don't think it's the CD drive either as that seems to be a distinct device:-
brw-rw---- 1 root disk 8, 32 2010-01-02 17:39 /dev/sdc brw-rw----+ 1 root cdrom 11, 0 2010-01-02 17:39 /dev/sr0
So who/what/where is /dev/sdc coming from and can I get rid of it somehow so it doesn't wast boot time?
2010/1/2 Chris G cl@isbd.net:
I have been looking at reducing my system's boot-up time and noticed that it seemed to spend quite a lot of time detecting a device called /dev/sdc.
I only have two real hard disks on the system, they're /dev/sda and /dev/sdb. However in dmesg I see:-
[ 7.681894] usb-storage: device scan complete [ 7.690995] scsi 6:0:0:0: Direct-Access Generic Ultra HS-SD/MMC 1.82 PQ: 0 ANSI: 0 [ 7.691402] sd 6:0:0:0: Attached scsi generic sg3 type 0 [ 7.707729] sd 6:0:0:0: [sdc] Attached SCSI removable disk
Is this a laptop? It might be a memory card reader.
Tim.
On Sat, Jan 02, 2010 at 06:37:09PM +0000, Tim Green wrote:
2010/1/2 Chris G cl@isbd.net:
I have been looking at reducing my system's boot-up time and noticed that it seemed to spend quite a lot of time detecting a device called /dev/sdc.
I only have two real hard disks on the system, they're /dev/sda and /dev/sdb. However in dmesg I see:-
[ 7.681894] usb-storage: device scan complete [ 7.690995] scsi 6:0:0:0: Direct-Access Generic Ultra HS-SD/MMC 1.82 PQ: 0 ANSI: 0 [ 7.691402] sd 6:0:0:0: Attached scsi generic sg3 type 0 [ 7.707729] sd 6:0:0:0: [sdc] Attached SCSI removable disk
Is this a laptop? It might be a memory card reader.
That was it, nearly, it was the memory card reader in my monitor which I had (inadvertently) left connected. Removing the USB lead to the monitor has speeded things up significantly.
2010/1/3 Chris G cl@isbd.net:
On Sat, Jan 02, 2010 at 06:37:09PM +0000, Tim Green wrote:
Is this a laptop? It might be a memory card reader.
That was it, nearly, it was the memory card reader in my monitor which I had (inadvertently) left connected. Removing the USB lead to the monitor has speeded things up significantly.
Glad to help.
I hate BIOSes which slow down their boot times to probe all the connected USB devices too.
Tim.
On Sat, Jan 02, 2010 at 06:03:08PM +0000, Chris G wrote:
[ 7.690995] scsi 6:0:0:0: Direct-Access Generic Ultra HS-SD/MMC 1.82 PQ: 0 ANSI: 0
Ultra High-Speed Secure Digital/MultiMediaCard (i.e. an SD card reader).
Adam
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Adam Bower -
Chris G -
Tim Green