From: wb@freebie.xs4all.nl (Wilko Bulte)
Subject: [TUHS] Irwin 285
Date: Fri, 22 Jan 2010 17:55:30 +0100 [thread overview]
Message-ID: <20100122165530.GA39771@freebie.xs4all.nl> (raw)
In-Reply-To: <20100122153825.GA22757@bitmover.com>
Quoting Larry McVoy, who wrote on Fri, Jan 22, 2010 at 07:38:25AM -0800 ..
> On Fri, Jan 22, 2010 at 11:15:57AM +0100, Jochen Kunz wrote:
> > On Fri, 22 Jan 2010 10:34:09 +0100
> > Wilko Bulte <wb at freebie.xs4all.nl> wrote:
> >
> > > recoverable read error rate I presume.
> > No. NON-recoverable read error rate: 1 per 10^14 bits.
> >
> > And this is for light desktop use. Heavy IO on the disk may increase
> > failure rate. At least this is written in the technical data sheet of
> > the drive. WD drives are not that much better: 1 per 10^15 bits.
>
> You guys are funny. I've been doing backups for at least 15 years
We aim to please :)
> and I can tell you story after story about tape failures that
> happened to me personally (anyone remember the lovely exabyte 8200,
> "fondly" remembered as the write-only device?). On the other hand,
I had an 8200.... :-P
> disks work pretty well and when they fail, they fail in little
> chunks and you can almost always get the rest of the data.
Most often yes, unless you have production batch issues, like HDA
contamination etc. Can take out RAIDsets at a time, given that they
typically are built from the same production batch drives..
> For the data I really care about, our digital photo collection, it's
> all stored in BitKeeper's so-called binary asset management (BAM).
> All the data is CRC-ed, it's all replicated, and if anything goes
Replication does it, I agree!
> bad the bad data can easily be replaced from any of the other
> (populated) replicas. I periodically run "bk bam check" which
> goes through all the data and checks the crc's and have yet to
> see an error. Been doing that for years.
>
> Tape. Bah. You can keep it, I'm OK with disk.
Hihi..
Wilko
> ---
> Larry McVoy lm at bitmover.com http://www.bitkeeper.com
> _______________________________________________
> TUHS mailing list
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--- End of quoted text ---
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next prev parent reply other threads:[~2010-01-22 16:55 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-21 10:26 Sergey Lapin
2010-01-21 10:51 ` Brantley Coile
2010-01-21 11:19 ` Jochen Kunz
2010-01-21 11:32 ` Wilko Bulte
2010-01-21 12:07 ` Sergey Lapin
2010-01-21 12:37 ` Jason Stevens
2010-01-21 13:02 ` Wilko Bulte
2010-01-21 16:50 ` Jochen Kunz
2010-01-21 17:11 ` Jochen Kunz
2010-01-21 17:37 ` M. Warner Losh
2010-01-21 17:41 ` Sergey Lapin
2010-01-21 19:00 ` Jochen Kunz
2010-01-21 19:10 ` Al Kossow
2010-01-21 19:36 ` Jochen Kunz
2010-01-21 19:41 ` Wilko Bulte
2010-01-21 19:45 ` John Cowan
2010-01-21 18:59 ` Wilko Bulte
2010-01-21 19:48 ` Jochen Kunz
2010-01-21 19:56 ` Wilko Bulte
2010-01-21 19:58 ` Larry McVoy
2010-01-21 20:00 ` Wilko Bulte
2010-01-21 20:11 ` Larry McVoy
2010-01-21 20:26 ` Jason Stevens
2010-01-21 20:41 ` Wilko Bulte
2010-01-21 20:44 ` Larry McVoy
2010-01-21 21:00 ` Wilko Bulte
2010-01-21 21:01 ` Larry McVoy
2010-01-21 21:36 ` lyricalnanoha
2010-01-21 22:15 ` Larry McVoy
2010-01-21 22:22 ` M. Warner Losh
2010-01-22 9:14 ` Jochen Kunz
2010-01-22 9:34 ` Wilko Bulte
2010-01-22 10:15 ` Jochen Kunz
2010-01-22 10:46 ` Wilko Bulte
2010-01-22 11:06 ` Jochen Kunz
2010-01-22 11:12 ` Wilko Bulte
2010-01-22 15:38 ` Larry McVoy
2010-01-22 16:52 ` Jochen Kunz
2010-01-22 16:55 ` Wilko Bulte [this message]
2010-01-21 20:46 ` Jason Stevens
2010-01-21 22:15 ` Aaron J. Grier
2010-01-21 22:57 ` Wilko Bulte
2010-01-21 20:36 ` Wilko Bulte
2010-01-21 20:44 ` Corey Lindsly
2010-01-21 21:45 ` Wilko Bulte
2010-01-22 0:36 ` [TUHS] Backup software (was: Irwin 285) Greg 'groggy' Lehey
2010-01-22 0:48 ` Jason Stevens
2010-01-28 20:27 ` Brad Spencer
2010-02-12 17:03 ` Tim Bradshaw
2010-02-15 1:19 ` [TUHS] dump(8) compatibility (was: Backup software (was: Irwin 285)) Greg 'groggy' Lehey
2010-02-15 1:24 ` Jason Stevens
2010-02-15 1:30 ` [TUHS] dump(8) compatibility M. Warner Losh
2010-02-15 2:27 ` Larry McVoy
2010-02-15 5:05 ` Warner Losh
2010-02-15 5:18 ` Jason Stevens
2010-01-21 20:33 ` [TUHS] Irwin 285 Jochen Kunz
2010-01-21 20:44 ` Wilko Bulte
2010-01-21 20:47 ` Larry McVoy
2010-01-22 9:23 ` Jochen Kunz
2010-01-22 9:32 ` Wilko Bulte
2010-01-22 0:38 ` [TUHS] Tape backups? (was: Irwin 285) Greg 'groggy' Lehey
2010-01-21 20:18 ` [TUHS] Irwin 285 Jochen Kunz
2010-01-21 12:05 ` Andrzej Popielewicz
2010-01-21 12:12 ` Sergey Lapin
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