The ANSI SCSI Enclosure Services (SES-2) specification can be downloaded here.
SAF-TE: SCSI accessed fault-tolerant enclosures interface specification
(Editor’s note: Below from Intel’s SAF-TE site)
This specification defines a set of SCSI commands for setting drive status information, including status for RAID arrays, into a (SAF-TE compliant) disk drive array enclosure. The drive array enclosure may be a separate enclosure, or the same enclosure. The specification also defines commands for managing hot-swap drive slots and returning environmental health information for a drive enclosure.
The status commands are typically used by the enclosure manufacturer to assert lights or other indicators Read more…