I have a Dell T710 with Seagate Cheetah 15k.7 SAS disks. If the T710 motherboard dies, I'll need to resort to one of my nightly off-site backups and salvage the journal/logfile from the SAS disk to bring the backup bang up-to-date.

I need a way of reading the healthy-but-inaccessible SAS disc that does not depend on the only SAS-capable machine I have to hand.

So I bought:
SAS to SATA Adapter
and:
USB 2.0 to SATA Adapter with Power
...so that I could read the SAS drive via USB.

I can plug it all together just fine. The chain looks like: USB -> SATA -> SAS. But the drive does not spin up and the computer doesn't even acknowledge anything being attached by USB.

Is there a cheap external enclosure I can buy for SAS drives? I can't believe these USB to SATA adapters are everywhere but the USB to SAS adapters are almost non-existent...