[ILUG] Hardware and Software raid

[Albert White - SUN Ireland]

> On Wed, Jul 10, 2002 at 05:47:06PM +0100, Cunningham, Donal (Donal) mentioned:
> > > Sun never do hardware raid. Their opinion is that your Ultra 
> > > CPU's are likely faster than any raid card, and better at doing RAID 
> > > anyway.
> > What about the A1000 and T3?
> 
>  Aren't A1000's just disk arrays, that are mounted as standard SCSI disks
> by the sun box ?
nono..
Its a disk array managed by raid manager. It appears as LUN's and not separate 
disks eg:
       8. c2t5d0 <Symbios-StorEDGEA1000-0301 cyl 65533 alt 2 hd 64 sec 84>
          /pseudo/rdnexus at 2/rdriver at 5,0

Part      Tag    Flag     Cylinders         Size            Blocks
  2     backup    wu       0 - 65532      167.99GB    (65533/0/0) 352305408

The D1000 is just standard disks that you need Disksuite/whatever to get RAID, 
perhaps this is what youre thinking of?

> It's a while since I did sun kit, so I've no idea what a
> T3 is.
Has 9 disks, you telnet in and configure it with the RAID of your choice. It 
presents 2 `disks`/LUNs back to solaris:
       2. c1t2d0 <SUN-T300-0117 cyl 34530 alt 2 hd 48 sec 128>
          /ssm at 0,0/pci at 1c,600000/SUNW,qlc at 1/fp at 0,0/ssd at w50020f230000564f,0
       3. c1t2d1 <SUN-T300-0117 cyl 34530 alt 2 hd 48 sec 128>
          /ssm at 0,0/pci at 1c,600000/SUNW,qlc at 1/fp at 0,0/ssd at w50020f230000564f,1

  2     backup    wu       0 - 34529      101.16GB    (34530/0/0) 212152320

All on the web site http://www.sun.com/storage if people want more info.
go there - buy stuff ;)

Cheers,
~Al

-- 
Expressed in this posting are my opinions.  They are in no way related
to opinions held by my employer, Sun Microsystems.
Statements on Sun products included here are not gospel and may
be fiction rather than truth.