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DateSun, 15 Aug 2004 11:37:59 +0200
FromNigel Kukard <>
Subjectexternal drive size differences
Something very very interesting... below is an external drive enclosure
supporting both USB2 and Firwire, fitted with a 200Gb IDE Hdd.

When plugged into the firewire bus, i get 137Gb size, when plugged into
the usb bus, i get 200Gb size.

Could this be a bug in the kernel? or external hardware?

<snip>
ieee1394: sbp2: Logged into SBP-2 device
ieee1394: Node 0-00:1023: Max speed [S400] - Max payload [2048]
  Vendor: WDC WD20  Model: 00JB-00FUA0       Rev:
  Type:   Direct-Access                      ANSI SCSI revision: 06
SCSI device sdb: 268435455 512-byte hdwr sectors (137439 MB)
sdb: asking for cache data failed
sdb: assuming drive cache: write through
 sdb: sdb1
</snip>

<snip>
scsi7 : SCSI emulation for USB Mass Storage devices
  Vendor: USB 2.0   Model: Storage Device    Rev: 0100
  Type:   Direct-Access                      ANSI SCSI revision: 02
SCSI device sdb: 390721968 512-byte hdwr sectors (200050 MB)
sdb: assuming drive cache: write through
 sdb: sdb1
</snip>


Regards
Nigel Kukard


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