Hi David, I have seen simmilar errors given out by some storage arrays. There were caused by arrays exporting volumes via more then a single path without multi path driver installed or configured properly. Some times the array controllers requires a special driver to be installed on Linux host (for example RDAC mpp driver) to properly present and handle configured volumes in the OS. What sort of disk raid array are you using?
Best gerads, Wojciech On 12 August 2010 17:58, David Noriega <[email protected]> wrote: > We just setup a lustre system, and all looks good, but there is this > nagging error thats floating about. When I reboot any of the nodes, be > it a OSS or MDS, I will get this: > > [r...@meta1 ~]# dmesg | grep sdc > sdc : very big device. try to use READ CAPACITY(16). > SCSI device sdc: 4878622720 512-byte hdwr sectors (2497855 MB) > sdc: Write Protect is off > sdc: Mode Sense: 77 00 10 08 > SCSI device sdc: drive cache: write back w/ FUA > sdc : very big device. try to use READ CAPACITY(16). > SCSI device sdc: 4878622720 512-byte hdwr sectors (2497855 MB) > sdc: Write Protect is off > sdc: Mode Sense: 77 00 10 08 > SCSI device sdc: drive cache: write back w/ FUA > sdc:end_request: I/O error, dev sdc, sector 0 > Buffer I/O error on device sdc, logical block 0 > end_request: I/O error, dev sdc, sector 0 > > This doesn't seem to affect anything. fdisk -l doesn't even report the > device. The same(thought of course different block device sdd, sde, on > the OSSs), happens on all the nodes. > > If I run pvdisplay or lvdisplay, I'll get this: > /dev/sdc: read failed after 0 of 4096 at 0: Input/output error > > Any ideas? > David > -- > Personally, I liked the university. They gave us money and facilities, > we didn't have to produce anything! You've never been out of college! > You don't know what it's like out there! I've worked in the private > sector. They expect results. -Ray Ghostbusters > _______________________________________________ > Lustre-discuss mailing list > [email protected] > http://lists.lustre.org/mailman/listinfo/lustre-discuss > -- Wojciech Turek Senior System Architect High Performance Computing Service University of Cambridge Email: [email protected] Tel: (+)44 1223 763517
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