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 at 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 at 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 at 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.
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On May 18, 2009, at 4:04 PM, "P.A" <razor at 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 at 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 at 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 at 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
P.A wrote:> I'm not sure what sdb is since its not listed on my partition table >Did you/do you have a USB device connected? What does cat /proc/scsi/scsi say ? nate
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 at 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 at 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 at 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. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 258 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20090518/2008eb2d/attachment-0004.sig>
At Mon, 18 May 2009 14:34:09 -0700 CentOS mailing list <centos at 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 at 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 at 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 at 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.> > Content-Description: OpenPGP digital signature > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.9 (MingW32) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iEYEARECAAYFAkoR1FEACgkQRADw9lziUqSFqQCfbmvnU7QiS52OENvRc7W/Kgdu > lagAnA4NQ7TawhIAcFCkm3HGG7GMTPn7 > =hdcu > -----END PGP SIGNATURE----- > > MIME-Version: 1.0 > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > >-- Robert Heller -- 978-544-6933 Deepwoods Software -- Download the Model Railroad System http://www.deepsoft.com/ -- Binaries for Linux and MS-Windows heller at deepsoft.com -- http://www.deepsoft.com/ModelRailroadSystem/