Thanks. First let me correct an error. The chip is actually a JM20337
USB -> SATA+PATA bridge, as you correctly point out. I was confused
by a reference to the JM20338 on the PCB. Apparently it refers to an
optional unpopulated connector location.
Eventually I found that the following command worked, but only after
editing the registry:
smartctl -a -d usbjmicron scsi10
I couldn't use scsi00 or scsi01 as these were assigned to my two
optical drives (DVD-ROM and DVD writer).
Instead I modified the following registry key by changing SCSILUN
from 0 to 1. For some reason Win98 chose a non-unique SCSILUN and
SCSITargetID (0,0) for my external USB drive. This registry
modification did not persist after disconnecting and reconnecting the
USB HDD -- the original 0,0 values returned. BTW I don't have any
real SCSI devices or adapters.
"Mfg"="(Standard disk drives)"
Here are the relevant data for my Athlon XP machine using a JMicron
driver under Windows 98SE:
This is the log file for my AMD K6-2 Win98SE box using a generic
Microsoft USB mass storage driver:
smartctl -a -r ioctl,2 -d usbjmicron scsi10
At 07:27 PM 11/03/09, you wrote:
>Franc Zabkar wrote:
> > Please excuse my ignorance, but I'm trying to access a 320GB Seagate
> > PATA HDD in a USB JMicron enclosure from within a DOS box in Windows
> > 98SE.
> > This is the command line I am trying to use:
> > smartctl -i -d usbjmicron dev_name
> > I have one PATA HD (sda) and two optical drives.
> > What device name should I be using?
>Access to USB devices requires OS support to send SCSI commands through
>USB. The only SCSI pass through support available on 9x/ME is the old
>ASPI layer. The pseudo-device names used by smartctl to access ASPI are
>'scsi[0-9][0-f]', see man page. But I don't know whether this actually
>works for USB devices.
> > I believe the chipset is the JM20338.
>idProduct 0x2338 is also used by some products with JM20337.
>JM20337 is a USB -> SATA+PATA bridge.
>JM20338 is a USB+SATA -> PATA bridge.
>(probably same chip with different firmware?)
>Does the enclosure provide both USB and eSATA ?