Re: Behavior of mdadm depending on user

2007-07-03 Thread Ian Dall
On Mon, 2007-07-02 at 21:10 -0500, Michael Schwarz wrote: This ia just a couple of quick questions. I'm charged with developing a prototype application that will assemble and mount a hot-swapped drive array, mount it, transfer files to it, unmount it, and stop the array. And it is an

Proposed enhancement to mdadm: Allow --write-behind= to be done in grow mode.

2007-07-03 Thread Ian Dall
There doesn't seem to be any designated place to send bug reports and feature requests to mdadm, so I hope I am doing the right thing by sending it here. I have a small patch to mdamd which allows the write-behind amount to be set a array grow time (instead of currently only at grow or create

Re: Proposed enhancement to mdadm: Allow --write-behind= to be done in grow mode.

2007-07-03 Thread David Greaves
Ian Dall wrote: There doesn't seem to be any designated place to send bug reports and feature requests to mdadm, so I hope I am doing the right thing by sending it here. I have a small patch to mdamd which allows the write-behind amount to be set a array grow time (instead of currently only at

Re: Linux Software RAID is really RAID?

2007-07-03 Thread Mark Lord
Johny Mail list wrote: 2007/7/3, Tejun Heo [EMAIL PROTECTED]: Brad Campbell wrote: Johny Mail list wrote: Hello list, I have a little question about software RAID on Linux. I have installed Software Raid on all my SC1425 servers DELL by believing that the md raid was a strong driver. And

[RFC PATCH 0/2] raid5: 65% sequential-write performance improvement, stripe-queue take2

2007-07-03 Thread Dan Williams
The first take of the stripe-queue implementation[1] had a performance limiting bug in __wait_for_inactive_queue. Fixing that issue drastically changed the performance characteristics. The following data from tiobench shows the relative performance difference of the stripe-queue patchset. Unit

Re: Linux Software RAID is really RAID?

2007-07-03 Thread Tejun Heo
Mark Lord wrote: I believe he said it was ICH5 (different post/thread). My observation on ICH5 is that if one unplugs a drive, then the chipset/cpu locks up hard when toggling SRST in the EH code. Specifically, it locks up at the instruction which restores SRST back to the non-asserted

Re: Proposed enhancement to mdadm: Allow --write-behind= to be done in grow mode.

2007-07-03 Thread Ian Dall
On Tue, 2007-07-03 at 15:03 +0100, David Greaves wrote: Ian Dall wrote: There doesn't seem to be any designated place to send bug reports and feature requests to mdadm, so I hope I am doing the right thing by sending it here. I have a small patch to mdamd which allows the write-behind