Date: Mon, 6 Nov 2017 17:26:30 -0700 From: Scott Long <scottl@samsco.org> To: Andrew Vylegzhanin <avv314@gmail.com> Cc: freebsd-scsi@freebsd.org Subject: Re: LSI2008 and SAS3 backplane Message-ID: <24CF75B3-D75C-41B2-952A-77E94152F3D8@samsco.org> In-Reply-To: <CA%2BBi_Yj7LNVB86-o_PmWMxeiz8DZ6n-8jyFpngOAmKJXCxL4nQ@mail.gmail.com> References: <CA%2BBi_Yj7LNVB86-o_PmWMxeiz8DZ6n-8jyFpngOAmKJXCxL4nQ@mail.gmail.com>
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Hi, If you=E2=80=99re using FreeBSD 11 or later, try running the following: mpsutil show devices 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@gmail.com> = wrote: >=20 > Hi! >=20 > I have a problem with low transfer speed (150MB/sec instead of = 600Mb/sec) > on SAS2 controller to SAS3 drive via SAS3 backplane. >=20 > Hardware config is follows: >=20 > 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. >=20 > 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) >=20 > 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. >=20 > Any ideas? >=20 > -- > Andrew > _______________________________________________ > freebsd-scsi@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-scsi > To unsubscribe, send any mail to = "freebsd-scsi-unsubscribe@freebsd.org"
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