I/o-error on 3rd-party raid

Question

Hi all,
i am experiencing something rather unexpected. The xsan-1.3 setup i am running was extended with an infortrend FC2SATA-Raid (All other raids are XRaids). Everything works fine and the addintional space was added flawlessly. I experience no problems in the regular xsan-enviroment. Write speed and read speed is absoluly okay.
Still the raid itself, as seen by the xsan clients causes syslog-messages like:
Jan 10 14:51:52 server92 kernel[0]: disk6: I/O error.
The XSan-volume is disk8. When looking whith diskutil which disk is disk6 i get the following:
server92:~ admin$ diskutil list
/dev/disk0
#: type name size identifier
0: Applepartitionscheme *76.7 GB disk0
1: Applepartitionmap 31.5 KB disk0s1
2: Apple_Boot 128.0 MB disk0s3
3: Apple_RAID 76.6 GB disk0s4
/dev/disk1
#: type name size identifier
0: Applepartitionscheme *76.7 GB disk1
1: Applepartitionmap 31.5 KB disk1s1
2: Apple_Boot 128.0 MB disk1s3
3: Apple_RAID 76.6 GB disk1s4
/dev/disk2
#: type name size identifier
0: Apple_HFS Server_HD *76.6 GB disk2
/dev/disk3
#: type name size identifier
0: AppleXsanComponent *465.8 GB disk3
/dev/disk4
#: type name size identifier
0: AppleXsanComponent *2.7 TB disk4
/dev/disk5
#: type name size identifier
0: AppleXsanComponent *2.7 TB disk5
/dev/disk6
#: type name size identifier
0: AppleXsanComponent *6.4 TB disk6
/dev/disk7
#: type name size identifier
0: AppleXsanComponent *1.8 TB disk7
/dev/disk8
#: type name size identifier
0: Apple_Xsan San *13.6 TB disk8
This happens only on the clients which have the XSan-Volume mounted as a client. Not on the metadata-controllers.
Any hints?
Tom
Mac OS X (10.4.3)
Mac OS X (10.4.3)
  Mac OS X (10.4.3)  

Answer 1

What hard drive is it? What does the error say, and when do you see it?
- Peter