On Sat, 1 Dec 2007, Justin Piszcz wrote:
On Sat, 1 Dec 2007, Janek Kozicki wrote:
Justin Piszcz said: (by the date of Sat, 1 Dec 2007 07:23:41 -0500
(EST))
dd if=/dev/zero of=/dev/sdc
The purpose is with any new disk its good to write to all the blocks and
let the drive to all of
On Sun, 2 Dec 2007, Oliver Martin wrote:
[Please CC me on replies as I'm not subscribed]
Hello!
I've been experimenting with software RAID a bit lately, using two
external 500GB drives. One is connected via USB, one via Firewire. It is
set up as a RAID5 with LVM on top so that I can easily
Justin Piszcz schrieb:
It rebuilds the array because 'something' is causing device
resets/timeouts on your USB device:
Dec 1 20:04:49 quassel kernel: usb 4-5.2: reset high speed USB device
using ehci_hcd and address 4
Naturally, when it is reset, the device is disconnected and then
-Original Message-
From: ChristopherD [mailto:[EMAIL PROTECTED]
Sent: Sunday, December 02, 2007 4:03 AM
To: linux-raid@vger.kernel.org
Subject: Abysmal write performance on HW RAID5
In the process of upgrading my RAID5 array, I've run into a brick wall
(
4MB/sec avg write
Justin Piszcz schrieb:
Naturally, when it is reset, the device is disconnected and then
re-appears, when MD see's this it rebuilds the array.
Least you can do is to add an internal bitmap to your raid, this will
make rebuilds faster :-/
--
Janek Kozicki
On Sun, 2 Dec 2007, Janek Kozicki wrote:
Justin Piszcz said: (by the date of Sun, 2 Dec 2007 04:11:59 -0500 (EST))
The badblocks did not do anything; however, when I built a software raid 5
and the performed a dd:
/usr/bin/time dd if=/dev/zero of=fill_disk bs=1M
I saw this somewhere
Justin Piszcz said: (by the date of Sun, 2 Dec 2007 04:11:59 -0500 (EST))
The badblocks did not do anything; however, when I built a software raid 5
and the performed a dd:
/usr/bin/time dd if=/dev/zero of=fill_disk bs=1M
I saw this somewhere along the way:
[42332.936706] ata5.00:
On Mon, 3 Dec 2007, Michael Tokarev wrote:
Justin Piszcz said: (by the date of Sun, 2 Dec 2007 04:11:59 -0500 (EST))
The badblocks did not do anything; however, when I built a software raid 5
and the performed a dd:
/usr/bin/time dd if=/dev/zero of=fill_disk bs=1M
I saw this somewhere
root 2206 1 4 Dec02 ?00:10:37 dd if /dev/zero of 1.out
bs 1M
root 2207 1 4 Dec02 ?00:10:38 dd if /dev/zero of 2.out
bs 1M
root 2208 1 4 Dec02 ?00:10:35 dd if /dev/zero of 3.out
bs 1M
root 2209 1 4 Dec02 ?00:10:45 dd if
On Sunday December 2, [EMAIL PROTECTED] wrote:
Anyway, the problems are back: To test my theory that everything is
alright with the CPU running within its specs, I removed one of the
drives while copying some large files yesterday. Initially, everything
seemed to work out nicely, and by the
On Sunday December 2, [EMAIL PROTECTED] wrote:
Was curious if when running 10 DD's (which are writing to the RAID 5)
fine, no issues, suddenly all go into D-state and let the read/give it
100% priority?
So are you saying that the writes completely stalled while the read
was progressing?
On Mon, 3 Dec 2007, Neil Brown wrote:
On Sunday December 2, [EMAIL PROTECTED] wrote:
Anyway, the problems are back: To test my theory that everything is
alright with the CPU running within its specs, I removed one of the
drives while copying some large files yesterday. Initially, everything
Justin Piszcz wrote:
While we are on the subject of bad blocks, is it possible to do what
3ware raid controllers do without an external card?
They know when a block is bad and they remap it to another part of the
array etc, where as with software raid you never know this is happening
until
Hello,
with kernel 2.6.22.10 checking a raid1 or rebuilding ist does not work on one
of our machines. After a short time the rebuild/check does not make progress
any more . Processes which then access the filesystems on those raids are
blocked.
Nothing gets logged. Access to other filesystems
Neil Brown schrieb:
This isn't a resync, it is a data check. Dec 2 is the first Sunday
of the month. You probably have a crontab entries that does
echo check /sys/block/mdX/md/sync_action
early on the first Sunday of the month. I know that Debian does this.
It is good to do this
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