Frank Steinmetzger <Warp_7@gmx.de> wrote:
: UHAP023@alpha1.rhbnc.ac.uk schrob:

: > Dear All,
: > I have an 8GB USB memory stick which I believe is faulty. I know
[cut]
: > Below is the set of tests I've used. Is there anything I've overlooked?

: A year ago vendors deliberately mislabelled their devices with incorrect
: capacities. Someone from heise wrote a test tool f?r this case:
: http://www.wintotal.de/Software/?id=4379
: I don't know if it tells you more than you already know (because I haven't
: used it yet), but you can still have a look.

Many thanks for that tip. I've tested the memory stick with it on a
couple of different machines. Both give the same diagnostic as
follows;

The media is likely to be defective.
1.9 GByte OK (4087424 sectors)
5.8 GByte DATA LOST (12274048 sectors)
Details:5.8 GByte overwritten (12274048 sectors)
0 KByte slightly changed (< 8 bit/sector, 0 sectors)
0 KByte corrupted (0 sectors)
2 KByte aliased memory (4 sectors)
First error at offset: 0x000000007cbd0000
Expected: 0x000000007cbd0000
Found: 0x000000007cbcf800
H2testw version 1.3
Writing speed: 6.33 MByte/s
Reading speed: 12.9 MByte/s
H2testw v1.4

I don't think there can be any doubt now that the USB stick is faulty.

Cheers
Tom.

Ps. The email address in the header is just a spam-trap.
--
Tom Crane, Dept. Physics, Royal Holloway, University of London, Egham Hill,
Egham, Surrey, TW20 0EX, England.
Email: T.Crane at rhul dot ac dot uk
Fax: +44 (0) 1784 472794