Re: [PATCH md 2 of 4] Fix raid6 problem

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Sorry for the delay in replying, I've been using RAID6 in a real life
situation with 2.6.9 + patch, for 2 months now, with 1.15Tb of storage,
and I have had more than 1 drive failure... as well as some rather
embarasing hardware corruption which I traced to a faulty IDE controller.

Dispite some random DMA corrupion, and loosing a total of 3 disks, I have
not had any problems with it RAID6 itself, and really it has litereally
saved my data from being lost.

I ran a diff against the 2.6.9 patch and what is in 2.6.10... and they are
not the same, presumably a more elegant fix has been implimented for the
production kernel??

As an aside,

At the moment, I am experimenting with RAID on top of USB Mass Storage
devices... it's interesting because the USB system takes a significant
time to identify and make each drive available, and I have to determine if
all the drives have become available before starting any arrays....

Does anyone have any experience with this sort of thing?

I'm sure H. Peter Anvin said somthing about:
> Followup to:  <38038.212.158.231.74.1099526180.squirrel@xxxxxxxxxxxxxxx>
> By author:    "A. James Lewis" <james@xxxxxxxxxx>
> In newsgroup: linux.dev.raid
>>
>> I'd like to put raid6 to use, and after reading through the process of
>> tracking down this bug, it seems that a rational explanation was found
>> for
>> the data corruption, and the fix well tested... but being new to a lot
>> of
>> the process here, what is the process for this to get into the standard
>> kernel... perhaps 2.6.10 will have this patch??
>>
>> Obviously I could apply the patch to raid6main.c on my system, but it
>> would be  good to use a standard kernel...
>>
>> The problem is only when writing to a degraded array, but most of us are
>> impatient and want to write a filesystem and get it mounted before the
>> first sync is complete... and those, like me cursed with bad hardware
>> will
>> have 2 drives fail at the same time (last week!) and hence raid6 is very
>> appealing :).
>>
>
> Hi James,
>
> This patch got integrated in, I believe, 2.6.10-rc2.
>
> Please let me know what your experience is.  It would be good to get
> the EXPERIMENTAL tag taken off at some point.
>
> 	-hpa
>
>
> !DSPAM:41b79a8888125029010830!
>
>
>


-- 
¯·.¸¸.·´¯·.¸¸.-> A. James Lewis (james@xxxxxxxxxx)
http://www.fsck.co.uk/personal/nopistons.jpg
MAZDA - World domination through rotary power.

-
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux RAID Wiki]     [ATA RAID]     [Linux SCSI Target Infrastructure]     [Linux Block]     [Linux IDE]     [Linux SCSI]     [Linux Hams]     [Device Mapper]     [Device Mapper Cryptographics]     [Kernel]     [Linux Admin]     [Linux Net]     [GFS]     [RPM]     [git]     [Yosemite Forum]


  Powered by Linux