Re: HELP! New disks being dropped from RAID 6 array on every reboot

2007-11-23 Thread Dan Williams
On Nov 23, 2007 11:19 AM, Joshua Johnson <[EMAIL PROTECTED]> wrote: > Greetings, long time listener, first time caller. > > I recently replaced a disk in my existing 8 disk RAID 6 array. > Previously, all disks were PATA drives connected to the motherboard > IDE and 3 promise Ultra 100/133 controll

Re: [PATCH] Skip bio copy in full-stripe write ops

2007-11-23 Thread Neil Brown
On Friday November 23, [EMAIL PROTECTED] wrote: > > Hello all, > > Here is a patch which allows to skip intermediate data copying between the > bio > requested to write and the disk cache in if the full-stripe write > operation is > on the way. > > This improves the performance of write op

Re: HELP! New disks being dropped from RAID 6 array on every reboot

2007-11-23 Thread BERTRAND Joël
Joshua Johnson wrote: Greetings, long time listener, first time caller. I recently replaced a disk in my existing 8 disk RAID 6 array. Previously, all disks were PATA drives connected to the motherboard IDE and 3 promise Ultra 100/133 controllers. I replaced one of the Promise controllers with

HELP! New disks being dropped from RAID 6 array on every reboot

2007-11-23 Thread Joshua Johnson
Greetings, long time listener, first time caller. I recently replaced a disk in my existing 8 disk RAID 6 array. Previously, all disks were PATA drives connected to the motherboard IDE and 3 promise Ultra 100/133 controllers. I replaced one of the Promise controllers with a Via 64xx based control

Re: md RAID 10 on Linux 2.6.20?

2007-11-23 Thread Bill Davidsen
[EMAIL PROTECTED] wrote: Hi all, I am running a home-grown Linux 2.6.20.11 SMP 64-bit build, and I am wondering if there is indeed a RAID 10 "personality" defined in md that can be implemented using mdadm. If so, is it available in 2.6.20.11, or is it in a later kernel version? In the past, t

Re: Proposal: non-striping RAID4

2007-11-23 Thread Chris Green
Ignoring the issues of using mismatched drive sizes, is it possible to achieve the data resilience of this non-striped raid4 using the current linux-raid? I'm not so interested in being able to use mismatched drives, etc, but I am interested in being able to create a raid setup with the enhanc

[PATCH] Skip bio copy in full-stripe write ops

2007-11-23 Thread Yuri Tikhonov
Hello all, Here is a patch which allows to skip intermediate data copying between the bio requested to write and the disk cache in if the full-stripe write operation is on the way. This improves the performance of write operations for some dedicated cases when big chunks of data are being s

Re: Offtopic: hardware advice for SAS RAID6

2007-11-23 Thread Sven Rudolph
Richard Michael <[EMAIL PROTECTED]> writes: > I'm considering my first SAS purchase. I'm planning to build a software > RAID6 array using a SAS JBOD attached to a linux box. I haven't decided > on any of the hardware specifics. > > I'm leaning toward this PCI express LSI 3801e controller: > http