cvs commit: src/sys/dev/usb umass.c
phk at phk.freebsd.dk
Wed Feb 28 06:08:47 UTC 2007
In message <200702272233.l1RMXocb004983 at repoman.freebsd.org>, Warner Losh write
> Some USB mass storage devices return the number of sectors in response
> to a READ_CAPACITY request rather than the maximum sector (off by one
> problem). This causes a huge cascade of errors as the geom tasting
> code tries to read the last sector (which isn't really there in the
> face of this error). automated tools that manipulate disk labels and
> such also have issues.
> Create a new quirk READ_CAPACITY_OFFBY1
A better idea would be to have scsi_da.c try to read the
last sector and chop it if it fails.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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