Re: problem killing raid 5

2007-10-02 Thread Daniel Santos
All the drives are identical, and they are on identical usb enclosures. I am starting to suspect USB. It frequently resets the enclosures. I'll have to look at that first. Anyway I had it working before for some time. Justin Piszcz wrote: On Mon, 1 Oct 2007, Daniel Santos wrote: It stopped

Journalling filesystem corruption fixed in between?

2007-10-02 Thread Rustedt, Florian
Hello list, some folks reported severe filesystem-crashes with ext3 and reiserfs on mdraid level 1 and 5. Is this safe now? Or should i only use non-journalling-filesystems on software-raid-devices? Kind regards, Florian Rustedt

Re: Journalling filesystem corruption fixed in between?

2007-10-02 Thread Justin Piszcz
On Tue, 2 Oct 2007, Rustedt, Florian wrote: Hello list, some folks reported severe filesystem-crashes with ext3 and reiserfs on mdraid level 1 and 5. Is this safe now? Or should i only use non-journalling-filesystems on software-raid-devices? Kind regards, Florian Rustedt

Raid performance problems (pdflush / raid5 eats 100%)

2007-10-02 Thread Goswin von Brederlow
Hi, we (Q-Leap networks) are in the process of setting up a high speed storage cluster and we are having some problems getting proper performance. Our test system consists of a 2x dual core system with 2 dual channel UW scsi controlers connected to 2 external raid boxes and we use iozone with

Re: Raid performance problems (pdflush / raid5 eats 100%)

2007-10-02 Thread Justin Piszcz
On Tue, 2 Oct 2007, Goswin von Brederlow wrote: Hi, we (Q-Leap networks) are in the process of setting up a high speed storage cluster and we are having some problems getting proper performance. Our test system consists of a 2x dual core system with 2 dual channel UW scsi controlers

Re: Raid performance problems (pdflush / raid5 eats 100%)

2007-10-02 Thread Goswin von Brederlow
Justin Piszcz [EMAIL PROTECTED] writes: Have you tried a 1024k stripe and 16384k stripe_cache_size? I'd be curious what kind of performance/write speed you get with that configuration. Justin. stripe_cache_size is not in KiB of memory but in multiples of some internal structures. So 16384

Re: [PATCH] [mdadm] Add klibc support to mdadm.h

2007-10-02 Thread H. Peter Anvin
maximilian attems wrote: klibc still misses a lot functionality to let mdadm link against, this small step helps to get to the real trouble.. :) Signed-off-by: maximilian attems [EMAIL PROTECTED] --- mdadm.h |9 - 1 files changed, 8 insertions(+), 1 deletions(-) diff --git