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vdev_id: multi-lun disks & slot num zero pad

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Add ability to generate disk names that contain both a slot number
and a lun number in order to support multi-actuator SAS hard drives
with multiple luns. Also add the ability to zero pad slot numbers to
a desired digit length for easier sorting.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Matthew Heller <matthew.f.heller@accre.vanderbilt.edu>
Closes #16603
This commit is contained in:
Matthew Heller
2024-10-08 20:43:04 -04:00
committed by Brian Behlendorf
parent 10f46d2aba
commit 2609d93b65
2 changed files with 24 additions and 4 deletions
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man/man5/vdev_id.conf.5
+9 -1
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@@ -92,6 +92,11 @@ before a generic mapping for the same slot.
In this way a custom mapping may be applied to a particular channel
and a default mapping applied to the others.
.
.It Sy zpad_slot Ar digits
Pad slot numbers with zeros to make them
.Ar digits
long, which can help to make disk names a consistent length and easier to sort.
.
.It Sy multipath Sy yes Ns | Ns Sy no
Specifies whether
.Xr vdev_id 8
@@ -122,7 +127,7 @@ device is connected to.
The default is
.Sy 4 .
.
.It Sy slot Sy bay Ns | Ns Sy phy Ns | Ns Sy port Ns | Ns Sy id Ns | Ns Sy lun Ns | Ns Sy ses
.It Sy slot Sy bay Ns | Ns Sy phy Ns | Ns Sy port Ns | Ns Sy id Ns | Ns Sy lun Ns | Ns Sy bay_lun Ns | Ns Sy ses
Specifies from which element of a SAS identifier the slot number is
taken.
The default is
@@ -138,6 +143,9 @@ use the SAS port as the slot number.
use the scsi id as the slot number.
.It Sy lun
use the scsi lun as the slot number.
.It Sy bay_lun
read the slot number from the bay identifier and append the lun number.
Useful for multi-lun multi-actuator hard drives.
.It Sy ses
use the SCSI Enclosure Services (SES) enclosure device slot number,
as reported by