Messages in this thread | | | Date | Fri, 26 Dec 2008 04:07:19 -0500 (EST) | From | Justin Piszcz <> | Subject | RE: mismatch_cnt, random bitflips, silent corruption(?), mdadm/sw raid[156] |
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On Thu, 25 Dec 2008, David Lethe wrote:
>> -----Original Message----- >> From: linux-raid-owner@vger.kernel.org [mailto:linux-raid- >> >> Other options? >> >> How do others maintain data integrity? Just not worry about it until >> you have >> to, rely on backups.. or? >> >> Justin. > > 4GB files using gpg and tar in the '90s? Sorry, to clarify they were ~650-700MiB tars but combined to around a ~4GiB file later on (from the late 90s), CD's were cheap and yeah 2GiB limit. But later on to consolidate I moved them to 4GiB DVDs and thus tarred them together and then gpg on top of that.
> I know gpg had 2GB file-related bugs as late as 2005 that caused corruption, and > there was a heck of a lot of 2GB-related bugs in 2.2 and 2.4 kernels which you > must have been running back then. You are also using later versions of these > programs on the new systems, and I'd be willing to bet they compound the problem by > assuming there was no corruption to begin with. Once I restored the data from DVDs, I was able to restore *all* data successfully.
> > I use: > - gzipped tar archives, but I gzip the individual files, rather than the tarball. That way > any compression-related bugs are limited to a single file. I copy them to DVDs. That works as well, but are they your regular files gzipped, no encryption?
> > - For online/nearline, I now use a ZFS, but on a native Solaris system that functions as my primary > NFS/CIFS/iSCSI server with and a ZFS software-RAID based file system. I am profoundly impressed with > it, and when they release the deduplication enhancement for ZFS, I'll adopt it and won't have to buy > any more DVDs, except for offsite archiving purposes. Wow, I did not know ZFS had plans for de-dupe!! I will have to look into this, thanks for the info.
Justin.
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