On Fri, 7 Sep 2012, Michael J Gruber wrote: > On Fri, Sep 7, 2012 at 11:30 AM, Michael J Gruber > <michaeljgruber+fedora-lists@xxxxxxxxx> wrote: > > [Originally posted to fedora general, where Alan Cox suspected a usb > > issue and suggested this list.] > > > > F17 with current updates gets the sector count wrong (too large by 5) > > for my SSD (Jetflash USB), resulting in read errors (during boot, fdisk > > reading the disk etc.) for those sectors. While everything "seems to > > work" this is not OK, of course. I'd be grateful for any clue. > > > > [The device provides USB to S-ATA, is USB3, connected to a USB2 port.] > > > > Test systems > > ============ > > F16 with updates (kernel 3.4.9-2) > > F17 live (kernel 3.3.4-5) > > F17 with updates (kernels 3.3.4-5, 3.5.0-2, 3.5.2-3, 3.5.3-1) > > > > F16 and F17 live are OK, F17 with updates is not (no matter which > > kernel), where "OK" means no read errors. So the relevant difference is > > not in the kernel but something else which has been updated since release. > > Some additional info on the confusing part about 3.3.4-5 being OK with > live (everything release), not with an otherwise updated install: > The real issue here seems to be the difference between a (soft) reboot > and a hard shutdown, then boot. More specifically: > > Boot with 3.3.4-5: OK > Reboot into 3.5.3-1: not OK > Reboot into 3.3.4-5: not OK > Shutdown, then boot into 3.3.4-5: OK > > So, something in the newer kernels seems to put my SSD into a state > which is cleared by a power off only. Smells like HPA?? This proves the problem is not a USB issue, because USB sends only the data it is told to send by the SCSI layer. Try posting your problem on the linux-scsi mailing list. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
