* Re: RAID5 - 2nd drive died whilst waiting for RMA
2004-11-17 11:24 ` Måns Rullgård
@ 2004-11-17 11:44 ` Brad Campbell
2004-11-17 12:04 ` David Greaves
1 sibling, 0 replies; 4+ messages in thread
From: Brad Campbell @ 2004-11-17 11:44 UTC (permalink / raw)
To: Måns Rullgård; +Cc: David Greaves, Guy, linux-raid, linux-ide
Måns Rullgård wrote:
> David Greaves <david@dgreaves.com> writes:
>
>
>>I've been tracking this on the ide list and I've been nervous of
>>applying anything since I don't have proper backups. I'm relying on
>>redundancy.
>
>
> RAID can *never* replace proper backups. RAID only protects against
> low-level disk failures. Filesystem corruption caused by bugs,
> accidental deleting of files, etc. are happily allowed. Get a DVD
> burner, you'll thank yourself one day.
>
Heh. I have 2.5TB here. Thats a lot of DVD's.
I have the whole lot set chmod a-w and rely on RAID to keep me alive. (Having said it is a home
entertainment system and would not cause mega dollar industrial damage if I lost it). All my
original media is about 9,000km away but I could survive until I re-ripped it.
I slide my array drives out and slide in some throwaway spares to beat on for testing before I
deploy a new kernel.
David Greaves wrote:
>
> I looked to see what I'd need to do and given I'm running 2.6.9 I take it I'd have to apply:
>
> http://www.kernel.org/pub/linux/kernel/people/jgarzik/libata/2.6.9-libata1-dev1.patch.bz2
> which depends on
>
> http://www.kernel.org/pub/linux/kernel/people/jgarzik/libata/2.6.9-libata1.patch.bz2
>
> That seems like quite a lot and I'm not clear on the level of stability impact on my system.
>
> Now although I track linux-ide I doubt I'm fully informed!!
> So if anyone would like to inform me of a reasonable course of action then I'm actually reasonably happy to apply the SMART patch.
That is pretty close. I actually just cloned the kernel bk tree and pulled both of Jeffs trees, but
then I ran about 10 hours of super intensive tests with 5 spare drives spread across my 3
controllers before I slid my 13 raid disks back in and let it loose. I guess my real kernel version
is somewhere around 2.6.10-rc1-bk3.
Have had good luck with it over the last couple of weeks and I have been hitting it pretty hard.
But, as I said before, I'm on a UP machine. Andy pointed out some possible issues on SMP so beware
there.
Brad
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: RAID5 - 2nd drive died whilst waiting for RMA
2004-11-17 11:24 ` Måns Rullgård
2004-11-17 11:44 ` Brad Campbell
@ 2004-11-17 12:04 ` David Greaves
1 sibling, 0 replies; 4+ messages in thread
From: David Greaves @ 2004-11-17 12:04 UTC (permalink / raw)
To: Måns Rullgård; +Cc: Brad Campbell, Guy, linux-raid, linux-ide
Måns Rullgård wrote:
>David Greaves <david@dgreaves.com> writes:
>
>
>>I've been tracking this on the ide list and I've been nervous of
>>applying anything since I don't have proper backups. I'm relying on
>>redundancy.
>>
>>
>RAID can *never* replace proper backups. RAID only protects against
>low-level disk failures. Filesystem corruption caused by bugs,
>accidental deleting of files, etc. are happily allowed. Get a DVD
>burner, you'll thank yourself one day.
>
>
Got one.
I have 935Gb of data (soon to be 1.2Tb)
Each DVD holds 4.7Gb and takes 20-30 mins to burn.
Any other ideas ? ;)
David
PS Seriously - the data is films, my CDs, DVDs, TV shows and the like.
It's a bummer to lose but in the grand scheme of things it's only the telly.
My _real_ personal data (photos etc) are mirrored onto physically
seperate disks each night. The 'backups' are remounted read-only. It's
the 'rsync snapshot' method.
See: http://www.mikerubel.org/computers/rsync_snapshots/
Thanks for your concern though :)
^ permalink raw reply [flat|nested] 4+ messages in thread