udip...@gmail.com said: > dick at nagual.nl wrote: >> Maybe because on the fifth day some hardware failure occurred? ;-) > > That would be which? The system works and is up and running beautifully. > OpenSolaris, as of now.
Running beautifully as long as the power stays on? Is it hard to believe hardware might glitch at power-failure (or power-on-after-failure)? > Ah, you're hinting at a rare hardware glitch as underlying problem? AFAIU, > it is a proclaimed feature of ZFS that writes are atomic, out and over Not only does ZFS advertise atomic updates, it also _depends_ on them, and checks for them having happened, likely more so than other filesystems. Is it hard to believe that ZFS is exercising and/or checking up on your hardware in ways that Linux does not do? > Uwe, > who is a big fan of a ZFS that fulfills all of its promises. Snapshots and > luupgrade have yet to fail me on it. And a few other beautiful things. It is > the reliability that makes me wonder if UFS/FFS/ext3 are not better choices > in this respect. Blaming standard, off-the-shelf hardware as 'too cheap' is a > too slippery slope, btw. Sorry to hear you're still having this issue. I can only offer anecdotal experience: Running Solaris-10 here, non-mirrored ZFS root/boot since last December (other ZFS filesystems, mirrored and non-mirrored, for 2 years prior), on standard off-the-shelf PC, slightly more than 5 years old. This system has been through multiple power-failures, never with any corruption. Same goes for a 2-yr-old Dell desktop PC at work, with mirrored ZFS root/boot; Multiple power failures, never any reported checksum errors or other corruption. We also have Solaris-10 systems at work, non-ZFS-boot, but with ZFS running without redundancy on non-Sun fiberchannel RAID gear. These have had power failures and other SAN outages without causing corruption of ZFS filesystems. We have experienced a number of times where systems failed to boot after power-failure, due to boot-archive being out of date. Not corrupted, just out of date. Annoying and inconvient for production systems, but nothing at all to do with ZFS. So, I personally have not found ZFS to be any less reliable in presence of power failures than Solaris-10/UFS or Linux on the same hardware. I wonder what is it that's unique or rare about your situation, that OpenSolaris and/or ZFS is uncovering? I also wonder how hard it might be to make ZFS resilient to whatever unique/rare circumstances you have, as compared to finding/fixing/avoiding those circumstances. Regards, Marion _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
