From: "Jake Hammer" <hammer@clarkisland.com>
Subject: RE: NFS read ok, write ok, simultaneous R+W=TERRIBLE
Date: Wed, 4 Dec 2002 22:27:09 -0800
Sender: nfs-admin@lists.sourceforge.net
Message-ID: <CFEAJJEGMGECBCJFLGDBKEHPCJAA.hammer@clarkisland.com>
References: <3DEEEC53.D24A1933@amis.com>
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Cc: "NFS" <nfs@lists.sourceforge.net>
To: <ewhiting@amis.com>
In-Reply-To: <3DEEEC53.D24A1933@amis.com>
Errors-To: nfs-admin@lists.sourceforge.net

> Sounds like you are not using the 3ware card for anything other than
> just an IDE controller right?

Exactly - I'm using it to give me SCSI JBOD.

> There is a linux-ide-raid mailing list -- with good info. I've seen
> people run raid 5 on the 3ware card and then use SW raid to stripe 2
> 3ware cards. RAID 51 of sorts.

I follow this list - no help as my disks are FAST. I'm using RAID 0+5 truth
be known. Every pair of drives is striped in software. That gives me 7
really fast drives (14 spindles striped in pairs). Then, I S/W Raid 5 those
together. All done with EVMS. So, 1 parity and 6 data basically.

> Also there was a pretty good IDE raid review today:
>
> http://tech-report.com/reviews/2002q4/ideraid/index.x?pg=1

I saw this cool article. My disks are *FAST* on R/W and R+W. My NFS is great
on read, great on write, but just dies on read + write. Hence the conundrum.

Neil or Trond - any clues?

Thanks,

Jake


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