Hello. Is there any way to add and remove scsi devices from an active md
device on-the-fly? For example: I wish to have a raid1 device set up for
backup purposes. When this filesystem gets full, I would like to pull one
of the mirrors out temporarily and write its contents to tape. Then,
aft
Since nearly a year I'm successfully running RAID0 on 3 SCSI disks.
The speed of the array is nearly the double speed of a single drive.
This week I had to setup a RAID0 array using two IDE disks on a
pentium VX board. A single disk gives me 10 mb/s using busmaster dma.
But using two disks togeth
On Thu, 12 Nov 1998, Chris Mauritz wrote:
> System details:
>
> AMD K6-233
[...]
> 2 x fast/wide/ultra 9.1gig 7200rpm disks (/export) ---> /dev/md0
[...]
> ---Sequential Output ---Sequential Input-- --Random--
> -Per Char- --Block--- -Rewrite-- -Per Char- -
> From [EMAIL PROTECTED] Thu Nov 12 11:04:31 1998
>
> I run a RAID0 mirror off the DualFire, just get Gerald's latest
> patches for best performance. I did a semi-apples&oranges comparison
> with Bonnie, the RAID0 made of identical old FUJITSU M1606S-512 drives
> versus MICROP 4341WS. The 4341
From: Kim-Ee Yeoh <[EMAIL PROTECTED]>
On Tue, 10 Nov 1998, Johns Daniel wrote:
> You can probably get more throughput with a dual-channel
> controller like the Mylex 952(?). And, I believe it
> is cheaper than the 958!
Actually, I was thinking of a Diamond Fireport Dual using
I use two SCSI partition(each 258M) as a raid1 device md1, and mount as /var
on my RH5.2 box.
When no crash occur, it works very well. But, when the unclean shutdown, it
must be fail at reboot. raidadd run OK, raidrun FAIL with
"md:09:01: raid array is not clean -- run ckraid".
Then I run ckraid(v
Just as a note, RAID-5 does not always give worse performance. Most disks
have a limit to the number of operations they can perform a second, if you
are dealing with a writing a large number of small files you can see an
improved performance using RAID-5 over a normal disk area in the following
wa
I'm using a PentiumII-MMX 333 with:
256MB, Adaptec AIC7880 Array 1000 scsi controller running
7x 8.7GB SEAGATE ST39140W MEDALIST Harddrives
Kernel 2.0.35 with raid0145-19981106-C-2.0.35 patch and Kernel 2.1.127
raid0145-19981109-C-2.1.127 patch
Raidtools 0.90 and Bonnie.
The first Harddrive of th
This isn't really a RAID related question, but it really could be. Does
anyone know of any useful background performance checking utilities like
iostat, etc.? Thanks in advance.
Marius Strom - [EMAIL PROTECTED]
Computer Geek/Telecommunations Engineering Student
Unix System Administrator, Alpha1
