[Gllug] Hardware IDE RAID

[Simon Faulkner]

Doug Winter wrote:

> On Sat 17 Jan Simon Faulkner wrote:
> 
>>Does it need software drivers or does it do all it's work in hardware?
> 
> 
> It's completely hardware - the pair of disks appears as a single scsi
> drive to the kernel:
> 
> SCSI subsystem driver Revision: 1.00
> 3ware Storage Controller device driver for Linux v1.02.00.036.
> scsi0 : Found a 3ware Storage Controller at 0xb800, IRQ: 24, P-chip: 1.3
> scsi0 : 3ware Storage Controller
> blk: queue c1cc9a18, I/O limit 4095Mb (mask 0xffffffff)
>   Vendor: 3ware     Model: Logical Disk 0    Rev: 1.0
>   Type:   Direct-Access                      ANSI SCSI revision: 00
> blk: queue c1cc9818, I/O limit 4095Mb (mask 0xffffffff)
> Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
> SCSI device sda: 398295040 512-byte hdwr sectors (203927 MB)
> Partition check:
>  /dev/scsi/host0/bus0/target0/lun0: p1 p2 p3 p4 < p5 p6 p7 p8 p9 >
> 
> sda here is really two IDE disks.  There is a configuration utility that
> is accessible at boot time which allows you to configure the mirror, and
> they provide a daemon, 3dmd, that monitors the status of the RAID,
> emailing you if part of it breaks, and allowing you to rebuild the raid
> if a disk fails.  
> 
> Irritatingly it's accessed over the web, but it works in text-based
> browsers.  It generally looks something like this:
> 
>   SCSI ID 0  3ware 7006-2 ATA RAID Controller
>     * Array Unit 0  Mirror (RAID 1)  203.92 GB   OK
>          + Port 0 Maxtor 6Y200P0    203.92 GB   OK
>          + Port 1 Maxtor 6Y200P0    203.92 GB   OK
> 
> Aha - actually you want the 7006-2, for some reason all the other
> escalades are 7506-something, but the 2 drive one isn't :)
> 
> http://www.3ware.com/products/parallel_ata.asp
> 
> The 3ware driver is part of the kernel (CONFIG_BLK_DEV_3W_XXXX_RAID),
> and is compiled as a module in Debian stock kernels - No idea about
> other distros though.
> 
> doug.
> 
I'm getting one Doug :-)

I'm thinking about 5 200Mb SATA Drives in RAID 5 for my server

and 2 200 Mb SATA Drives in my Workstation

Any thoughts?

Simon

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