In message <Pine.LNX.4.05.10004051253370.5831-100000@ns.snowman.net>, Stephen F
rost writes:
>On Wed, 5 Apr 2000, Ted Cabeen wrote:
>
>> It tried applying the patches in the order you described and it didn't work.
>> >From a brief lookover at the code, what it looks like to me is that the
>> current set of RAID patches don't work well with nested arrays,
>> particularly in the request code. With a single array, requests to
>> portions of the disk are mapped to the correct portion of the physical disk
>> that should hold that data. However, when you have an array on top of an
>> array, what happens is that the request is mapped to the correct portion of
>> the underlying raid array that makes up the top one, and that array doesn't
>> then map it again onto an actual disk. Unfortunately, I don't see exactly
>> where this is happening, or what steps should be taken to fix it.
>> Can someone look into this and see what needs to be done to correctly map
>> nested RAID requests? Thanks.
>
> Hrm, what type of RAID are you running? I've had RAID1 and RAID0
>working w/o any problems so far. I'll try RAID5 here in a few minutes and
>see how well it works.
I'm trying to run RAID linear on top of RAID 0. I've got two RAID 0 arrays
of 2 disks each that I want to concatenate, so I have one big volume in which
the first half of it stripes over two sets of disks and the second half
stripes over the other two. The RAID 0 arrays work fine alone, but when I
concatenate them, I get the request error.
-- Ted Cabeen http://www.pobox.com/~secabeen secabeen@pobox.com Check Website or finger for PGP Public Key secabeen@midway.uchicago.edu "I have taken all knowledge to be my province." -F. Bacon cococabeen@aol.com "Human kind cannot bear very much reality."-T.S.Eliot 73126.626@compuserve.com- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Fri Apr 07 2000 - 21:00:14 EST