[geeks] SATA vs SAS?

[Mouse]

> A SATA disk connected directly to a SAS controller will generally
> work.  Some SAS controllers are limited to SATA disks of under 2tb.

For my purposes "under 2tb" is big enough.  I've got four "72G" SAS
drives (actually about 68G) and I'd like to put in one or more of some
"1TB" (931G) SATA drives I have on hand instead.

> On the X4100, I believe they use one of the SAS controllers that has
> trouble with larger SATA disks.  I don't know if there is anything
> else to prevent using sata in it.

NetBSD 5.2 identifies it as

mpt0 at pci2 dev 3 function 0: vendor 0x1000 product 0x0050
mpt0: interrupting at ioapic2 pin 0
mpt0: Phy 0: Link Rate 3.0 Gbps
mpt0: Phy 1: Link Rate 3.0 Gbps
mpt0: Phy 2: Link Rate 3.0 Gbps
mpt0: Phy 3: Link Rate 3.0 Gbps
scsibus0 at mpt0: 108 targets, 8 luns per target
...
sd0 at scsibus0 target 0 lun 0: <SEAGATE, ST973401LSUN72G, 0556> disk fixed
sd0: 70007 MB, 14089 cyl, 24 head, 424 sec, 512 bytes/sect x 143374738 sectors
sd0: async, 8-bit transfers, tagged queueing
sd1 at scsibus0 target 1 lun 0: <SEAGATE, ST973401LSUN72G, 0556> disk fixed
sd1: 70007 MB, 14089 cyl, 24 head, 424 sec, 512 bytes/sect x 143374738 sectors
sd1: async, 8-bit transfers, tagged queueing
sd2 at scsibus0 target 2 lun 0: <SEAGATE, ST973401LSUN72G, 0556> disk fixed
sd2: 70007 MB, 14089 cyl, 24 head, 424 sec, 512 bytes/sect x 143374738 sectors
sd2: async, 8-bit transfers, tagged queueing
sd3 at scsibus0 target 3 lun 0: <SEAGATE, ST973401LSUN72G, 0556> disk fixed
sd3: 70007 MB, 14089 cyl, 24 head, 424 sec, 512 bytes/sect x 143374738 sectors
sd3: async, 8-bit transfers, tagged queueing

The Seagate drives are 10k RPM; for most of what I'm contemplating
using this machine for, I don't need that sort of speed (and SATA SSDs
would probably beat even the 10k spinning rust).

I'm unlikely to have the leisure to do anything with it for another day
or two, but when I do I'll have to try the SATA drives in it.

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