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<p class=MsoNormal>Hi recently I noticed in the messages log, the following
error<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>May 18 15:59:52 mail kernel: sdb: assuming drive cache:
write through<o:p></o:p></p>
<p class=MsoNormal>May 18 15:59:52 mail kernel: sdb : READ CAPACITY failed.<o:p></o:p></p>
<p class=MsoNormal>May 18 15:59:52 mail kernel: sdb : status=0, message=00,
host=1, driver=00<o:p></o:p></p>
<p class=MsoNormal>May 18 15:59:52 mail kernel: sdb : sense not available.<o:p></o:p></p>
<p class=MsoNormal>May 18 15:59:52 mail kernel: sdb: assuming Write Enabled<o:p></o:p></p>
<p class=MsoNormal>May 18 15:59:52 mail kernel: sdb: assuming drive cache:
write through<o:p></o:p></p>
<p class=MsoNormal>May 18 15:59:52 mail kernel: sdb:<3>Buffer I/O
error on device sdb, logical block 0<o:p></o:p></p>
<p class=MsoNormal>May 18 15:59:52 mail kernel: Buffer I/O error on device sdb,
logical block 0<o:p></o:p></p>
<p class=MsoNormal>May 18 15:59:52 mail last message repeated 5 times<o:p></o:p></p>
<p class=MsoNormal>May 18 15:59:52 mail kernel: unable to read partition
table<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I’m not sure what sdb is since its not listed on my
partition table<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>[root@mail srvadmin]# fdisk -l<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Disk /dev/sda: 109.1 GB, 109196476416 bytes<o:p></o:p></p>
<p class=MsoNormal>255 heads, 63 sectors/track, 13275 cylinders<o:p></o:p></p>
<p class=MsoNormal>Units = cylinders of 16065 * 512 = 8225280 bytes<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> Device Boot
Start
End Blocks Id System<o:p></o:p></p>
<p class=MsoNormal>/dev/sda1
*
1
13 104391 83 Linux<o:p></o:p></p>
<p class=MsoNormal>/dev/sda2
14 13275 106527015
8e Linux LVM<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>[root@mail srvadmin]# df -h<o:p></o:p></p>
<p class=MsoNormal>Filesystem
Size Used Avail Use% Mounted on<o:p></o:p></p>
<p class=MsoNormal>/dev/mapper/VolGroup00-LogVol00<o:p></o:p></p>
<p class=MsoNormal>
99G 42G 52G 45% /<o:p></o:p></p>
<p class=MsoNormal>/dev/sda1
99M 44M 51M 47% /boot<o:p></o:p></p>
<p class=MsoNormal>none
3.9G 0 3.9G 0% /dev/shm<o:p></o:p></p>
<p class=MsoNormal>[root@mail srvadmin]#<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>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.<o:p></o:p></p>
<p class=MsoNormal>Although everything looking fine, my messages log is full of
sdb complaints.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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