recently built a pair of systems sim. to your specs.
pII 350
128meg
2 8gig IBM
RH 5.2 and kernel 2.2.1,
primary use as a samba server (logon controller, home dirs, printing
for ~60 win95 clients)
we use the raid0145 1999 01 28 patch.
the array is created with the chunk size set. it is needed. to change chunk
size, you must re-make the array. if you re-make the array you have to re-make
the FS. i have never successfully upgraded a .36 raid box, just always made a
tape backup.
as far as chunk size, it seems that the file write speed of raid 1 is slow cause
you write to two disks. the read access types are more important- do you access
all of the 4 meg files at a time, or do you read in little blocks from it?
size your chunk size like that IMHO.
allan
Dave Wreski <[EMAIL PROTECTED]> said:
>
> Hi all. I\'ve read the most recent HOWTO, and still have a few questions. I
plan
> to implement RAID-1 on a 586 with two 6G IDE disks. Most files are greater
than
> 4M, if that makes a difference.
>
> If I want to experiement with different chunk sizes, must I rebuild the array
> for each different test? Will that destroy the existing data? Must I make a
> new filesystem after rebuilding the array each time?
>
> Surely I could test this to find out, but my test machine is a 486 with 32M,
and
> it takes quite a long time to build the array. Is it worth experimenting with
> chunk sizes on a mirror? What factors need to be taken into account when
> changing the sizes?
>
> How can I break the mirror? I see that by stoping the raid subsystem, I can
> mount the individual disk. Is there anything further that needs to be done?
>
> Is there an upgrade path from the 0.36 raid to the current 0.90 code? I
recall
> there being some problems at one point with compatibility?
>
> Thanks very much,
> Dave Wreski
>
>
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