LSI2008 and SAS3 backplane

[Andrew Vylegzhanin]

2017-11-07 3:26 GMT+03:00 Scott Long <scottl at samsco.org>:

> Hi,
>
>
Hi,

If you’re using FreeBSD 11 or later, try running the following:


> mpsutil show devices
>


 It's empty:

[root at zc-dtrs-s1 ~]# freebsd-version
11.1-RELEASE-p2
[root at zc-dtrs-s1 ~]# mpsutil show devices
B____T    SAS Address      Handle  Parent    Device        Speed Enc  Slot
 Wdt

[root at zc-dtrs-s1 ~]#

--
Andrew



>
> That will show what speed the drives are actually negotiated to.  This
> might shed some
> light on the problem.
>
> Scott
>
> > On Nov 6, 2017, at 3:37 PM, Andrew Vylegzhanin <avv314 at gmail.com> wrote:
> >
> > Hi!
> >
> > I have a problem with low transfer speed (150MB/sec instead of 600Mb/sec)
> > on SAS2 controller to SAS3 drive via SAS3 backplane.
> >
> > Hardware config is follows:
> >
> > Dell R720 box with Dell SAS HBA 6Gbps connected with Supermicro 45-bay
> JBOD
> > with two SAS-3 expanders (LSI SAS3x40 and LSI SAS3x36). All drives (20
> pcs)
> > are SEAGATE ST6000NM0095 E002.
> >
> > So, partial dmesg out:
> > ...
> > mps1: <Avago Technologies (LSI) SAS2008> port 0x9c00-0x9cff mem
> > 0xd0ff0000-0xd0ffffff,0xd0f80000-0xd0fbffff irq 66 at device 0.0
> > numa-domain 1 on pci16
> > mps1: Firmware: 07.15.08.00, Driver: 21.02.00.00-fbsd
> > mps1: IOCCapabilities:
> > 185c<ScsiTaskFull,DiagTrace,SnapBuf,EEDP,TransRetry,IR>
> > ....
> > ses1 at mps1 bus 0 scbus8 target 81 lun 0
> > ses1: <LSI SAS3x40 0601> Fixed Enclosure Services SPC-3 SCSI device
> > ses1: 150.000MB/s transfers
> > ses1: Command Queueing enabled
> > ses1: SCSI-3 ENC Device
> > ses2 at mps1 bus 0 scbus8 target 82 lun 0
> > ses2: <LSI SAS3x36 0601> Fixed Enclosure Services SPC-3 SCSI device
> > ses2: 150.000MB/s transfers
> > ses2: Command Queueing enabled
> > ses2: SCSI-3 ENC Device
> > ses1: da0: Element descriptor: 'Slot00'
> > ....
> > da0 at mps1 bus 0 scbus8 target 61 lun 0
> > da3 at mps1 bus 0 scbus8 target 64 lun 0
> > ...
> > da0: <SEAGATE ST6000NM0095 E002> Fixed Direct Access SPC-4 SCSI device
> > da0: Serial Number ZAD119P20000C730KZK3
> > da0: 150.000MB/s transfers
> > da0: Command Queueing enabled
> > da0: 5723166MB (11721045168 512 byte sectors)
> >
> > Some additional info.
> > There is two identical system with same problem.
> > System is under load now, and there is no erros, timeouts on disk i/o, so
> > it seems to be not cable/hardware problem.
> > I've tried other vendor SATA3 drive, got same 150MB/s.
> > This server works on full speed (600MB/s transfers) with SAS2 JBOD (Dell
> > MD1220)  w/o problems.
> >
> > Any ideas?
> >
> > --
> > Andrew
> > _______________________________________________
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> > https://lists.freebsd.org/mailman/listinfo/freebsd-scsi
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>
>