Re: Extremly slow usb disk

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Mon, Oct 22, 2012 at 11:44:56AM -0700, Björn Johannesson wrote:
> Hello list.
> 
> I just got this external USB HDD enclosure:
> http://www.raidsonic.de/en/products/soho-raid.php?we_objectID=7059
> It contains two Hitachi Deskstar 7k4000 disks in RAID 1 mode.
> 
> At first it did not want to attach at all, it just said:
> uhub4: device problem, disabling port 2
> 
> It finally probed giving:
> umass2 at uhub4 port 2 configuration 1 interface 0
> umass2: vendor 0x0dc4 IB-RD4320StU3, rev 2.10/1.00, addr 2
> umass2: using SCSI over Bulk-Only
> scsibus2 at umass2: 2 targets, 1 lun per target
> sd2 at scsibus2 target 0 lun 0: <SV SAFE, , 1.> disk fixed
> umass2: BBB bulk-in stall clear failed, IOERROR
> sd2: 3726 GB, 16383 cyl, 16 head, 63 sec, 4096 bytes/sect x 976754646 sectors
> 
> As you can see it gave an error there. I managed to "label" it with gpt
> and made an ffs filesystem on it.
> When mounting and using it it gives another
> umass2: BBB bulk-in stall clear failed, IOERROR
> and
> sd2(umass2:0:0:0): generic HBA error
> 
> Access to the drive is extremely slow. About 400k/s. Sometimes stalling or 
> giving ~20k/s.
> Anybody got a clue?

How did you partition and newfs it ? it is probably using 4k sectors, so you
have to do access on 4k boundary to avoid read/modify/write cycles.

> 
> Relevant line from "usbdevs -v":
> port 2 addr 2: full speed, self powered, config 1, IB-RD4320StU3(0x020a), 
> inXtron, Inc.(0x0dc4), rev 1.00, serial 12060D8301E9
> Shouldn't that be "high speed"?

maybe, The full dmesg could be usefull.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--