Filesystem, RAID questions

[Chris St Denis]

At 1TB the drive will take very long to fsck if the server ever crashes 
or looses power.

If this is a problem you should look into using gjournal(8)

Not sure off hand why it would be so slow, but keep in mind raid5 isn't 
particularly fast for writes


Rich Fairbanks wrote:
> Hi,
>
> I'm new to FreeBSD (and UNIX in general), and I have read through the
> handbook and various websites to gain some insight on this question, but
> haven't found a concrete solution yet, and I'm hoping you guys can help.
>
> I'm wanting to build a FreeBSD 7.0 based file server for a small/medium
> company that I work for and I've got the box up and running, samba is
> working fine, the only problem that I can see is that the array that I
> installed (3ware 9650SE) with 3 WD 1TB SATA drives in RAID 5 seems to be
> performing very slowly. This isn't just an issue of slow access over the
> network for the Windows users, but when I transfer a few GB from directory
> to directory on the array, or from the system disk to the array or vice
> versa.
>
> Now, this is how I set up the array. I installed the card, popped in the
> drives. The card bios found the drives and allowed me to setup in RAID 5.
> Then, FreeBSD booted and found the "disk" as da0. I want the entire array to
> be one big chunk of space. In other words, I don't need a bunch of slices or
> partitions (or DO I? I'm still very new to the whole slice vs. partition
> concept)
>
> I typed newfs /dev/da0 . A ton of numbers went across the screen, then I
> mounted /dev/da0 at /usr/home/storage. It works, but perhaps I missed a step
> that would have made things easier/perform better, etc.
>
> Besides creating the file system a different way, what would be an optimum
> stripe size for the array? I will using this for storing, basically, a TON
> of word documents and email messages, and a few large .pst files. So, the
> average file size will be in the 25-100K range, but a few 1-2GB files.
>
> Thanks for ANY and all help. If this question has been asked and answered a
> million times, please forgive me and just point me to the place where I can
> read up on this issue.
>
> Thanks,
>
> RF
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