USB HDD spin down problem

mackowiakp · 12-13-2019, 12:58 PM

I want to spin down USB connected Seagate USB HDD. It works correctly with M6, RPi and QNAP NAS. But not with M7. Below output from lsusb:

Code:

Bus 003 Device 008: ID 0bc2:3322 Seagate RSS LLC SRD0NF2 [Expansion Desktop Drive]

And from hdparm

Code:

[root@Piotr TMP]# hdparm -S120 /dev/sdc

/dev/sdc:
 setting standby to 120 (10 minutes)
SG_IO: bad/missing sense data, sb[]:  70 00 05 00 00 00 00 0a 00 00 00 00 24 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[root@Piotr ~]# hdparm -I /dev/sdc

/dev/sdc:
SG_IO: bad/missing sense data, sb[]:  70 00 05 00 00 00 00 0a 00 00 00 00 24 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Generally it works with kernel ver 4.xx but not with kernel ver 5.xx, probably because changing UAS mode access.

My device is Seagate Expansion Desk USB v3 4TB HDD (0bc2:3322) is listed in smartmontools as unsupported. It always shows that SMART is avaliable but disabled. No way to enable it.
Is any way to make it working with hdparm correctly as previous?

smallpond · 12-15-2019, 03:42 PM

The SCSI sense data says:

Code:

key = 05  ILLEGAL REQUEST
asc/ascq = 24/00 INVALID FIELD IN CDB

So hdparm sent an invalid command to that drive.

mackowiakp · 12-17-2019, 10:38 PM

According to https://www.smartmontools.org/wiki/SAT-with-UAS-Linux, for older USB to SATA converter, it is necessary to disable the UAS mode access in kernels 5.xxx.
So I create file /etc/modprobe.d/disable_uas.conf with content:

Code:

[root@Piotr Pobrane]# cat /etc/modprobe.d/disable_uas.conf
options usb-storage quirks=0bc2:3322:u

where 0bc2:3322 are VendorID:UnitID taken from lsusb.

It works now but iotop shows 5 M/s for USB v3 interface. It is 10 times slower than the same HDD connected to OpenVRT Asus based router. Any idea how to seed-up such connection?

ondoho · 12-18-2019, 01:25 AM

Not a direct answer, but I use this:

Code:

hdparm -B100 /dev/disk/by-id/usb...

Haven't noticed any perf. issues, and it does spin down.

mackowiakp · 12-18-2019, 10:39 PM

Yep. It works too. Byt with disabled the UAS access mode only. And still performance is very low. Does not matter I connect HDD to USB v3 or v3.1. HDD is v3 device.

ondoho · 12-31-2019, 09:10 AM

Must be the USB connection, one way or the other (inside the drive enclosure or inside your PC).
Usually these USB drives are just normal drives in a USB enclosure; you can try taking the drive out and connecting it directly via SATA cable or some such.

Did you say that you have performance problems with only one of three SBCs?
That would of course put a different spin on things.

mackowiakp · 01-13-2020, 02:19 AM

The only thing that helps is to disable UAS for particular USB device, as I described above. Then it is possible to use hdparm without problems. It is needed only on kernel 5.xx. Mageia forum stands that UAS does not support older USB/SATA chip converters so such disabling is necesery. Strange. My Seagate USB HDD is 2 or 3 years old so its rather new. But as we can see, not for 5.xx kernels, especially in Mageia (dont know about other distros).
But maybe someone know how to enable/disable UAS support on-demand? Is it possible at all?