Hi recently I noticed in the messages log, the following error
May 18 15:59:52 mail kernel: sdb: assuming drive cache: write through
May 18 15:59:52 mail kernel: sdb : READ CAPACITY failed.
May 18 15:59:52 mail kernel: sdb : status=0, message=00, host=1, driver=00
May 18 15:59:52 mail kernel: sdb : sense not available.
May 18 15:59:52 mail kernel: sdb: assuming Write Enabled
May 18 15:59:52 mail kernel: sdb: assuming drive cache: write through
May 18 15:59:52 mail kernel: sdb:<3>Buffer I/O error on device sdb, logical block 0
May 18 15:59:52 mail kernel: Buffer I/O error on device sdb, logical block 0
May 18 15:59:52 mail last message repeated 5 times
May 18 15:59:52 mail kernel: unable to read partition table
I'm not sure what sdb is since its not listed on my partition table
[root@mail srvadmin]# fdisk -l
Disk /dev/sda: 109.1 GB, 109196476416 bytes
255 heads, 63 sectors/track, 13275 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 13275 106527015 8e Linux LVM
[root@mail srvadmin]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
99G 42G 52G 45% /
/dev/sda1 99M 44M 51M 47% /boot
none 3.9G 0 3.9G 0% /dev/shm
[root@mail srvadmin]#
I looked at the hardware itself and all disk in this raid system are fine, my question is, is this something I need to worry about and what is causing this issue.
Although everything looking fine, my messages log is full of sdb complaints.
On May 18, 2009, at 4:04 PM, "P.A" razor@meganet.net wrote:
Hi recently I noticed in the messages log, the following error
May 18 15:59:52 mail kernel: sdb: assuming drive cache: write through
May 18 15:59:52 mail kernel: sdb : READ CAPACITY failed.
May 18 15:59:52 mail kernel: sdb : status=0, message=00, host=1, driver=00
May 18 15:59:52 mail kernel: sdb : sense not available.
May 18 15:59:52 mail kernel: sdb: assuming Write Enabled
May 18 15:59:52 mail kernel: sdb: assuming drive cache: write through
May 18 15:59:52 mail kernel: sdb:<3>Buffer I/O error on device sdb, logical block 0
May 18 15:59:52 mail kernel: Buffer I/O error on device sdb, logical block 0
May 18 15:59:52 mail last message repeated 5 times
May 18 15:59:52 mail kernel: unable to read partition table
I’m not sure what sdb is since its not listed on my partition table
[root@mail srvadmin]# fdisk -l
Disk /dev/sda: 109.1 GB, 109196476416 bytes
255 heads, 63 sectors/track, 13275 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 13275 106527015 8e Linux LVM
[root@mail srvadmin]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
99G 42G 52G 45% //dev/sda1 99M 44M 51M 47% /boot
none 3.9G 0 3.9G 0% /dev/shm
[root@mail srvadmin]#
I looked at the hardware itself and all disk in this raid system are fine, my question is, is this something I need to worry about and what is causing this issue.
Although everything looking fine, my messages log is full of sdb complaints.
What kind of RAID controller is it?
You might want to check to see if a USB memory stick is in a slot.
-Ross
on 5-18-2009 1:04 PM P.A spake the following:
Hi recently I noticed in the messages log, the following error
May 18 15:59:52 mail kernel: sdb: assuming drive cache: write through
May 18 15:59:52 mail kernel: sdb : READ CAPACITY failed.
May 18 15:59:52 mail kernel: sdb : status=0, message=00, host=1, driver=00
May 18 15:59:52 mail kernel: sdb : sense not available.
May 18 15:59:52 mail kernel: sdb: assuming Write Enabled
May 18 15:59:52 mail kernel: sdb: assuming drive cache: write through
May 18 15:59:52 mail kernel: sdb:<3>Buffer I/O error on device sdb, logical block 0
May 18 15:59:52 mail kernel: Buffer I/O error on device sdb, logical block 0
May 18 15:59:52 mail last message repeated 5 times
May 18 15:59:52 mail kernel: unable to read partition table
I’m not sure what sdb is since its not listed on my partition table
[root@mail srvadmin]# fdisk -l
Disk /dev/sda: 109.1 GB, 109196476416 bytes
255 heads, 63 sectors/track, 13275 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 13275 106527015 8e Linux LVM
[root@mail srvadmin]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
99G 42G 52G 45% //dev/sda1 99M 44M 51M 47% /boot
none 3.9G 0 3.9G 0% /dev/shm
[root@mail srvadmin]#
I looked at the hardware itself and all disk in this raid system are fine, my question is, is this something I need to worry about and what is causing this issue.
Although everything looking fine, my messages log is full of sdb complaints.
Does the system have memory card slots or a sd or cf reader? Some of those get detected as a scsi drive, but fail like this.
At Mon, 18 May 2009 14:34:09 -0700 CentOS mailing list centos@centos.org wrote:
on 5-18-2009 1:04 PM P.A spake the following:
Hi recently I noticed in the messages log, the following error
May 18 15:59:52 mail kernel: sdb: assuming drive cache: write through
May 18 15:59:52 mail kernel: sdb : READ CAPACITY failed.
May 18 15:59:52 mail kernel: sdb : status=0, message=00, host=1, driver=00
May 18 15:59:52 mail kernel: sdb : sense not available.
May 18 15:59:52 mail kernel: sdb: assuming Write Enabled
May 18 15:59:52 mail kernel: sdb: assuming drive cache: write through
May 18 15:59:52 mail kernel: sdb:<3>Buffer I/O error on device sdb, logical block 0
May 18 15:59:52 mail kernel: Buffer I/O error on device sdb, logical block 0
May 18 15:59:52 mail last message repeated 5 times
May 18 15:59:52 mail kernel: unable to read partition table
I’m not sure what sdb is since its not listed on my partition table
[root@mail srvadmin]# fdisk -l
Disk /dev/sda: 109.1 GB, 109196476416 bytes
255 heads, 63 sectors/track, 13275 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 13275 106527015 8e Linux LVM
[root@mail srvadmin]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
99G 42G 52G 45% //dev/sda1 99M 44M 51M 47% /boot
none 3.9G 0 3.9G 0% /dev/shm
[root@mail srvadmin]#
I looked at the hardware itself and all disk in this raid system are fine, my question is, is this something I need to worry about and what is causing this issue.
Although everything looking fine, my messages log is full of sdb complaints.
Does the system have memory card slots or a sd or cf reader? Some of those get detected as a scsi drive, but fail like this.
So do any removable SCSI or USB disk devices (Zip drives, Orb drives, etc.). Also any unformatted & unpartitioned USB mass storage devices will also do this. This could include USB thumb drives that have somehow lost their file system and/or partition table.
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