On Wed, Dec 28, 2005 at 07:21:08AM -0600, Ewan Grantham wrote:
> The problem is that currently md doesn't think it's talking to a group
> of cloop devices, it thinks it's talking to "real" devices (cbod to be
> exact) that are hosting ext3 partitions.
Well, in a very good sense no block device is
Jeff Breidenbach wrote:
The fundamental problem is that generic RS requires table lookups even
in the common case, whereas RAID-6 uses shortcuts to substantially
speed up the computation in the common case.
If one wanted to support a typical 8-bit RS code (which supports a max of
256 drives, i
> The fundamental problem is that generic RS requires table lookups even
> in the common case, whereas RAID-6 uses shortcuts to substantially
> speed up the computation in the common case.
If one wanted to support a typical 8-bit RS code (which supports a max of
256 drives, including ECC drives) i
On Thu, Dec 29, 2005 at 10:40:33AM -0800, H. Peter Anvin wrote:
> It's not really in-between; generic RS RAID would be many times slower
> than either; however, unlike raid10 it could survive *any* m failures
> where m is the number of redundancy drives.
>
> The fundamental problem is that generic
Followup to: <[EMAIL PROTECTED]>
By author:"Mario 'BitKoenig' Holbe" <[EMAIL PROTECTED]>
In newsgroup: linux.dev.raid
>
> Hello,
>
> Nathan Lewis <[EMAIL PROTECTED]> wrote:
> > As part of my Master's thesis, I am working on adding a Reed-Solomon
> > personality to the existing linux RAID str
Followup to: <[EMAIL PROTECTED]>
By author:Dan Stromberg <[EMAIL PROTECTED]>
In newsgroup: linux.dev.raid
>
>
> My understanding is that RAID 5 -always- stripes parity. If it didn't,
> I believe it would be RAID 4.
>
> You may find http://linux.cudeso.be/raid.php of interest.
>
> I don't t
On Thu, Dec 29, 2005 at 01:32:25PM +0200, Raz Ben-Jehuda(caro) wrote:
> what "wrt" stands for ?
"with respect to", see http://www.google.com/search?q=what+is+wrt .
Erik
--
+-- Erik Mouw -- www.harddisk-recovery.com -- +31 70 370 12 90 --
| Lab address: Delftechpark 26, 2628 XH, Delft, The Neth
what "wrt" stands for ?
On 12/29/05, Mark Overmeer <[EMAIL PROTECTED]> wrote:
> * Raz Ben-Jehuda(caro) ([EMAIL PROTECTED]) [051229 10:10]:
> > I have tested the overhead of linux raid0.
> > I used two scsi atlas maxtor disks ( 147 MB) and combined them to single
> > raid0 volume.
> > The raid is s
Thanks Lajber. Sorry for taking so long to reply but
it's been a busy week. Your test benchmarks look
interesting. Do they take into consideration the
random seeks that Molle mentioned in his email? As
Molle mentioned: "I've seen lots of MD tests, but none
that covered profiling MD's random acc
Sorry for taking so long to reply but it's been a
hectic week. Thanks for your reply. Out of
curiousity, what is MD's linear personality or DM?
Would this affect performance if I expanded my RAID
using this?
--- Molle Bestefich <[EMAIL PROTECTED]> wrote:
> Rik Herrin wrote:
> > I was intereste
* Raz Ben-Jehuda(caro) ([EMAIL PROTECTED]) [051229 10:10]:
> I have tested the overhead of linux raid0.
> I used two scsi atlas maxtor disks ( 147 MB) and combined them to single
> raid0 volume.
> The raid is striped in 256K stripes.
Are you sure you tested "linux" overhead? Maybe you have just t
Hello, list,
I try to test raidreconf utility on my spare drives in my disk nodes.
(i want to convert raid0 chunksize 32K to 1M)
Why happenning this?
[EMAIL PROTECTED] raid-converter]# cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid5] [multipath] [faulty]
md20 : active raid0 nbd7
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