On Mon, 30 Aug 1999, Andy Poling wrote:
> On Mon, 30 Aug 1999, Mike Black wrote:
> > But this is doing disk "reads" not "writes". It shouldn't need to read from
> > both disks.
>
> It does read balancing. That gives the best performance for an optimized
> configuration (in this case that would
Hi Mike,
You are using a very small chunk size. Increase this number to 128. I
think you may need to remake the array though. This is kind of silly
since in RAID-1, the data isn't laid out any differently for different
chunk sizes as other raid personalities are. It would be nice to be able
to ju
On Mon, 30 Aug 1999, Mike Black wrote:
> But this is doing disk "reads" not "writes". It shouldn't need to read from
> both disks.
It does read balancing. That gives the best performance for an optimized
configuration (in this case that would mean the two disks split across two
IDE busses).
>
On Mon, Aug 30, 1999 at 11:04:08AM -0400, Mike Black wrote:
> But this is doing disk "reads" not "writes". It shouldn't need to read from
> both disks.
>
> From
> http://ostenfeld.dk/~jakob/Software-RAID.HOWTO/Software-RAID.HOWTO-2.html#ss
> 2.3
>
> For RAID1:
> Read performance will usually sc
gt;
Sent: Monday, August 30, 1999 9:10 AM
Subject: Re: Why RAID1 half-speed?
On Mon, 30 Aug 1999, Mike Black wrote:
> I just set up a mirror this weekend on an IDE RAID1 - two 5G disks on the
> same IDE bus (primary and master).
>
> I was under the impression that I shouldn't se
On Mon, 30 Aug 1999, Mike Black wrote:
> I just set up a mirror this weekend on an IDE RAID1 - two 5G disks on the
> same IDE bus (primary and master).
> /dev/hda:
> Timing buffer-cache reads: 64 MB in 0.95 seconds =67.37 MB/sec
> Timing buffered disk reads: 32 MB in 3.28 seconds = 9.76
On Mon, 30 Aug 1999, Mike Black wrote:
> I just set up a mirror this weekend on an IDE RAID1 - two 5G disks on the
> same IDE bus (primary and master).
>
> I was under the impression that I shouldn't see any slowdown and maybe even
> a speedup but, alas, it is not so.
If you're at all concerned
I'm a little confused on RAID1...running 2.2.11 with
raid0145-19990824-2.2.11.bz2 on a PII/233
I just set up a mirror this weekend on an IDE RAID1 - two 5G disks on the
same IDE bus (primary and master).
I was under the impression that I shouldn't see any slowdown and maybe even
a speedup but, a
