[plug] Good RAID Howto

[Ben Jensz]

Unless you're already running hardware RAID on the current drives in the 
system, then sda will be a single physical drive, and sda1, sda2 etc are 
partitions within that physical drive.

If you're running proper hardware RAID, then the drives in whatever RAID 
level they are in will appear as one physical drive (i.e. sda could be 
multiple drives, but one drive is presented to the OS as it's been made 
into a single RAID drive).  But the additional drives you've added in 
this case aren't sda5-7.

They will be something like sdb, sdc, sdd etc.


/ Ben


Kai Jones wrote:

> Running "dmesg | grep sd" gives the following:
>
> Attached scsi disk sda at scsi0, channel 1, id 0, lun 0
> SCSI device sda: 71127040 512-byte hdwr sectors (36417 MB)
>  sda: sda1 sda2 < sda5 sda6 sda7 >
>
> I'm guessing this means sda, sda1 and sda2 are the active RAID1 and 
> sda5, 6 and 7 are spares because it doesn't yet know the 3 x 73 gig 
> disks are plugged in and waiting ?
>
> Cheers
> Kai
>