hi,

I want to setup a new system. There will be a lot of disks inside, which will be split between:
- one raid 0 with 2 hard disks and
- one or two raid 5, with lvm2 over it

raid 0 will be used as a system raid for Slackware, raid 5 for everything else. file system will be reiserfs.

my questions are:
1. which is the best chunk size and best configuration for raid 0?
64k is default in mdadm. it is for the OS, which probably contain a lot of small files.

2. which is the best chunk size for raid 5, which will contain a lot of big files (1-2gb)?

thanks a lot.

M.

I hope you mean RAID-1 for the OS, and not RAID-0.

As for the chunk-size, it really depends on the usage. If the
RAID-5 for example were to hold an Oracle database I'd suggest
using a chunksize that matches Oracles. If you make the chunks
too big you may suffer performance hits.



Cheers,
Tink

I am talking about RAID-0. I want more speed for the OS, and not the security if the disk would fall out, because this machine will no be used for critical stuff.


it will again hold nothing which require a lot of speed but I would to make it faster if I can. content will be: dvd backups, /home backups from the other PCs in the network, music files etc.

thanks

M.