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