[OpenIndiana-discuss] ZFS pool slow as molasses

[Julian Wiesener]

On 10/ 5/10 10:13 PM, Paul Johnston wrote:
> Er what sort of name would you expect to see for a sata device?

SATA devices normaly have a Taget, so it's c4t0d0 instead of c4d0. 
However, these are names, if you want to know what interface type is 
used, you should look on the device path:

This is what an SATA device looks like with Native AHCI disabled:

$ ls -la /dev/dsk/c7d0s0
lrwxrwxrwx   1 root     root          51 May 23  2009 /dev/dsk/c7d0s0 -> 
../../devices/pci at 0,0/pci-ide at 1f,2/ide at 0/cmdk at 0,0:a

This is what an SATA device looks like with Native AHCI enabled:

$ ls -la /dev/dsk/c3t0d0s2
lrwxrwxrwx   1 root     root          49 Jan  6  2009 /dev/dsk/c3t0d0s2 
-> ../../devices/pci at 0,0/pci1028,283 at 1f,2/disk at 0,0:c

Many especially older systems have it disabled by default because 
Windows was not able to boot from SATA devices in the past. Also some 
vendors disabled the Native AHCI switch in their BIOS. If you're lucky 
an BIOS update will make it available, if not, you're out of luck (or go 
to the fency BIOS hackers crowd and possible trash your BIOS).


Regards,
Julian