[plug] Good RAID Howto

[Kai]

Hi Shannon,

Thanks for the info, I'm pretty sure my work email addy is subscribed to 
PLUG, I sent the original email from my work addy but I'll have to check 
that since I didn't see any replies to this post at that addy.

I'm pretty sure I've seen the SCSI hardware info during start-up so the 
next chance I get to power down the file server and configure the SCSI 
I'll do it, I'll check out dmesg tomorrow when I get to work.

Cheers
Kai

Shannon Carver wrote:
> Hi, 
> 
> I'd almost garuntee with an HP NetServer, you'd have a professional
> hardware RAID controller.  The way to check for that is when the machine
> boots up, the PC will POST, before it boots the operating system, it'll
> usually prompt you momentarily for SCSI and or RAID setup panels
> (Usually with a key combination to enter them, one of the FX keys, or
> Ctrl+H, although can be anything really).
> 
> I've got a couple of servers here at work with Compaq Smart Array2
> cards.  When you enter the setup for the cards, you get a BIOS like
> screen asking you to create/change/remove active array's.  You can setup
> your raid array here.
> 
> The catch with using the raid controllers, is linux will pick the drives
> up as a different device, for instance, our Compaq cards create devices
> such as:
> /dev/c0dp1-x where c0 is the first array, and p1 is the partition on
> that array.
> 
> Of course, if the scsi drives are hanging off a plain scsi adapter, you
> should see them detected on bootup, or by reading /var/log/dmesg and
> looking for: 
> Dmesg | grep sd
> 
> Which will usually list all scsi devices found at bootup.
> 
> Hope this helps
> 
> Regards
> 
> Shannon
> 
> -----Original Message-----
> From: plug-bounces at plug.org.au [mailto:plug-bounces at plug.org.au] On
> Behalf Of Kai Jones
> Sent: Monday, 12 September 2005 10:14 AM
> To: PLUG
> Subject: [plug] Good RAID Howto
> 
> Hi guys and girls,
> 
> I know the principle of RAID and how it works but I've never had to 
> configure it before.
> 
> My current situation is I have an HP Netserver 2000 U3 running Red Hat 
> with 2.4.2-2 kernel as a file server, currently using 3 x 36 Gig SCSI's 
> on RAID 1.
> 
> I have three new 73gig SCSI disks which I want to configure so I can 
> copy the data from the existing 36 Gig RAID 1 and move those disks to 
> another machine (or use on a different mount point). The SCSI's are hot 
> swappable and I'm googing for Linux RAID Howto so I can figure out what 
> device (eg /dev/sd##) the drives are available at, then configure the 3 
> x 73 Gig drives as RAID 1, sync them, mount them and copy the data 
> across, test it and then move the old 36 gig disks to another server.
> 
> I'm currently reading 
> http://www.tldp.org/HOWTO/Software-RAID-HOWTO-5.html but if anyone has 
> any suggestions to a HOWTO that may be better/easier please let me know
> 
> Thanks
> Kai
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