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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/sg_ses.8 | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/sg_ses.8 b/doc/sg_ses.8 index 4afcb2b4..175e2fca 100644 --- a/doc/sg_ses.8 +++ b/doc/sg_ses.8 @@ -50,6 +50,13 @@ most recent reference for this utility is the draft SCSI Enclosure Services standards for SES, SES\-2 and SES\-3 are ANSI INCITS 305\-1998 and ANSI INCITS 448\-2008 and ANSI INCITS 518\-2017 respectively. .PP +SAS expanders typically have a SES device attached via a virtual port. +Some HBAs (SCSI initiators) choose to expose a SES device internally. That +means the SCSI subsystem on the host machine can see the SES device, but +devices connected to that HBA (e.g. a SAS expander) cannot see the HBA's +SES device. That internal SES device might report on the temperature(s) +of the HBA and whether anything is connected to its SCSI ports. +.PP The first form shown in the synopsis is for fetching and decoding dpages or fields from the SES \fIDEVICE\fR. A SCSI RECEIVE DIAGNOSTIC RESULTS command is sent to the \fIDEVICE\fR to obtain each dpage response. Rather than |