A posting to the freebsd-scsi mailing list I dug up indicates the same problem that was dropping my RAID1 to U_ on a regular basis. http://www.geocrawler.com/mail/msg.php3?msg_id=5421515&list=168 the problem install mentioned in this post used the exact same drives (IBM DDYS-T18350M) and the same SCSI controller .. The person answering, suggesting a possible firmware bug with the drive that causes it to completely disconnect, and recommends upgrading. I'm using Rev S80D firmware. He also mentions the re-assignment process for failed sectors.. I also found a 'critical update' note from a hardware raid maker, which includes this: MANY 144GB RAID ARRAY SYSTEMS INCLUDED IBM HARD DRIVES WHICH HAD AN OLDER VERSION OF THE DRIVES' FIRMWARE (S80D and S93E), WHICH CAN RANDOMLY CAUSE DRIVES TO DROP OUT OF THE ARRAY, CAUSING CRITICAL (CAUSING POOR PERFORMANCE) OR OFFLINE (CAUSING LOSS OF ALL DATA CONDITIONS. So i guess I've pretty much solved my particular U_ problems now :) (goes off to find out how to upgrade hard drive firmware) -Justin On Wed, Mar 20, 2002 at 08:48:40PM +0100, Jakob Østergaard wrote: > On Wed, Mar 20, 2002 at 04:57:33PM +0100, Martin Bene wrote: > > Hi Jakob, > > > > > To me it has been fairly common. > > > > I can confirm that, I've also seen this a few times. > > Actually, a year or so back, I didn't see this. But the past half year or few > months at least I've had heaps of disks do this... IBM... Not just GXP75, > or whatever the name of the "doomed series" were. > > ... > > As long as we're talking about raid5 or raid1, you should still be able to get the correct data from the raid device, use this to try a rewrite after a read error. if the write works and a read afterwards works as well => don't kick the disk. > > > > Having this functionality could be worthwile; of course if this triggers, it should write a warning to syslog. > > Hmm. I suppose you're right - that would be neat indeed. > > Cheers, > > -- > ................................................................ > : jakob@unthought.net : And I see the elder races, : > :.........................: putrid forms of man : > : Jakob Østergaard : See him rise and claim the earth, : > : OZ9ABN : his downfall is at hand. : > :.........................:............{Konkhra}...............: > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
