Date: Sun, 19 Dec 2021 11:28:54 -0800 From: bob prohaska <fbsd@www.zefox.net> To: Mark Millard <marklmi@yahoo.com> Cc: Free BSD <freebsd-arm@freebsd.org> Subject: Re: Dealing with slow USB disks, was: Re: Saving environment variables in u-boot Message-ID: <20211219192854.GB14873@www.zefox.net> In-Reply-To: <288258B0-40B0-44EC-B449-7A8FB81575F8@yahoo.com> References: <20211217013613.GA4452@www.zefox.net> <E2F6D50B-694A-4108-BD84-C85BC96AD832@yahoo.com> <20211218005946.GA7670@www.zefox.net> <5C44D0E6-2FF1-4EEB-B21A-83333D6FCF46@yahoo.com> <9D416106-660F-40BB-98D2-1354B53D2FEF@yahoo.com> <EC6CC83C-BC0A-4A12-866A-9FA24083FF7E@yahoo.com> <20211218223543.GA9484@www.zefox.net> <772E3794-B762-429F-B2A5-F504EA293C59@yahoo.com> <20211219043422.GA12811@www.zefox.net> <288258B0-40B0-44EC-B449-7A8FB81575F8@yahoo.com>
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On Sun, Dec 19, 2021 at 12:55:12AM -0800, Mark Millard wrote: > > http://www.zefox.net/~fbsd/slow_usb_notes shows: > > umass0 on uhub1 > umass0: <JMicron SABRENT, class 0/0, rev 2.10/12.14, addr 4> on usbus1 > umass0: SCSI over Bulk-Only; quirks = 0x8100 > umass0:0:0: Attached to scbus0 > . . . > a0 at umass-sim0 bus 0 scbus0 target 0 lun 0 > da0: <SABRENT 1214> Fixed Direct Access SPC-4 SCSI device > da0: Serial Number 000000000000A > da0: 40.000MB/s transfers > da0: 953869MB (1953525168 512 byte sectors) > da0: quirks=0x2<NO_6_BYTE> > > https://jamesachambers.com/fixing-storage-adapters-for-raspberry-pi-via-firmware-updates/ > > has material about SABRENT adapters: > > QUOTE > Sabrent and Orico both have the worst track records for working storage adapters for the Pi. I don???t recommend them at all but they can sometimes be fixed. > END QUOTE > > (Not that all models are bad.) > > I've not found anything to identify the specific product > that you are using. He lists some specific ones as > problematical but possibly fixable: > > ??? EC-SSHD* > ??? EC-UASP* > ??? EC-UK30* > ??? EC-UM3W* > ??? EC-DFLT* > ??? EC-NVME* > ??? EC-TFNE* > ??? EC-TFNB* > > (The above are JMicro based.) Can you identify your adapter > type? > The enclosure is simply marked SABRENT EC_UASP, The usb-sata bridge is marked JMS576 2026 QH8A3A A E76H20013 The "product brief" is at https://www.jmicron.com/file/download/1015/JMS576_Product+Brief.pdf but it's more advertising than technical. It claims Windows and Mac support, the omission of linux/bsd isn't surprising. I've tried power-cycling the disk, it doesn't seem to have any effect on discovery using usb reset. There is one slightly odd thing: Once the disk is found, it does not stay found. Left sitting at the u-boot prompt after discovery a subsequent usb reset frequently fails to find the disk and it's durably lost. A total system reset seems required to find it. One other observation... I tried smartctl on both Pi3 and P4. On the Pi3 it failed: root@pelorus:/usr/ports/sysutils/smartmontools # smartctl -a /dev/da0 smartctl 7.2 2021-09-14 r5236 [FreeBSD 13.0-STABLE arm64] (local build) Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org Read NVMe Identify Controller failed: scsi error unsupported field in scsi command On the Pi4 it worked: root@nemesis:/usr/local/poudriere # smartctl -a /dev/da0 smartctl 7.2 2021-09-14 r5236 [FreeBSD 14.0-CURRENT arm64] (local build) Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Model Family: Seagate Barracuda 2.5 5400 Device Model: ST1000LM048-2E7172 Serial Number: ZDEM543B ....[voluminous output snipped] Might the difference in behavior be significant? Thanks for reading! bob prohaska
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