https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212211
Bug ID: 212211
Summary: mrsas (4) does not allow smartctl to access S.M.A.R.T
data from physical drive hidden under /dev/daX
Product: Base System
Version: 10.3-STABLE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: freebsd-bugs@FreeBSD.org
Reporter: ste...@gmail.com
CC: freebsd-am...@freebsd.org
CC: freebsd-am...@freebsd.org
Given FreeBSD 10.3 system with LSI MegaRAID 9271-8i SATA/SAS RAID controller.
Recommended (and supported) driver for this newer controller is mrsas (4).
mrsas (4) provides OS with virtual drives /dev/daXX - although I found that
/dev/passX devices are also created for whatever purpose (/dev/daN has
corresponding /dev/passN) in case it matters.
Each /dev/daXX hides some (1 or more) physical SAS/SATA drives hidden under it.
Using MegaCLI utility, you can list PDs which of these are located by:
- either with a pair of values [EnclosureID:SlotID],
- or with the "device ID" which LSI MegaRAID somehow assigns to them.
I have fresh actual smartmontools installed:
smartctl 6.5 2016-05-07 r4318 [FreeBSD 10.3-STABLE amd64] (local build)
I want to get S.M.A.R.T. status of any physical drive attached to MegaRAID,
i.e. of an SSD which MegaRAID assigned device ID is 12, and it is hidden under
/dev/da0 virtual drive. But what I actually get:
[root@chort /]# smartctl -a /dev/da0
smartctl 6.5 2016-05-07 r4318 [FreeBSD 10.3-STABLE amd64] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
START OF INFORMATION SECTION
============================
Vendor: LSI
Product: MR9271-8i
Revision: 3.46
User Capacity: 199,481,098,240 bytes [199 GB]
Logical block size: 512 bytes
Terminate command early due to bad response to IEC mode page
A mandatory SMART command failed: exiting. To continue, add one or more '-T
permissive' options.
[root@chort /]#
Ok, I understand: /dev/da0 is not a physical drive, maybe it's a striped array
of 2 drives, smartctl gets confused, this is expected behavior.
Looking deeper, I discovered, that Linux version of smartctl is aware of this
situation, it allows the following syntax, where "-d megaraid,12" should tell
that we are dealing with LSI MegaRAID and we actually want to question the disk
with "device ID" 12. Tried with Ubuntu live CD, it actually works well.
But on FreeBSD this mode is not supported:
[root@chort /]# smartctl -a -d megaraid,12 /dev/da0
smartctl 6.5 2016-05-07 r4318 [FreeBSD 10.3-STABLE amd64] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
/dev/da0: Unknown device type 'megaraid,12'
=======> VALID ARGUMENTS ARE: ata, scsi, nvme[,NSID], sat[,auto][,N][+TYPE],
usbcypress[,X], usbjmicron[,p][,x][,N], usbprolific, usbsunplus, 3ware,N,
hpt,L/M/N, cciss,N, areca,N/E, atacam, auto, test <=======
Use smartctl -h to get a usage summary
[root@chort /]#
I already opened the ticket at https://www.smartmontools.org/ticket/734 but I
think that a clarification is needed here: does mrsas (4) support this kind of
queries at all, as of today?
Do we need some modifications to mrsas (4) in order to support the syntax like:
smartctl -a -d megaraid,12
or even better,
smartctl -a -d 'megaraid,[9:11'
or both? Or this is completely on the side of smartmontools? Thanks in advance!
WBR,
Andrii Stesin
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