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On Sun, Jun 26, 2016 at 06:45:50AM -0400, Chris Laprise wrote:
> More info, Marek...
>
> When I try to scan the /dev/sdb device with partx, it says the device is not
> readable or not valid device.
>
> When I plug in another USB stick, the partitions are enumerated as /dev/sdc1
> etc. but they cannot be mounted (devices are unreadable).
>
> From dmesg, these errors occur right before the /dev/root error and
> stoppage:
>
> scsi 6:0:0:0: Direct-Access Samsung Flash Drive 1100 PQ: 0 ANSI: 6
> sd 6:0:0:0: alua: supports implicit and explicit TPGS
> sd 6:0:0:0: alua: No target port descriptors found
> sd 6:0:0:0: alua: Attach failed (-22)
> sd 6:0:0:0: Failed to add device handler: -22
> sd 6:0:0:0: [sdb] ...several lines with drive size and flags...
> (trace dump occurs)
>
> This thread says disabling 'alua' module (scsi_dh_alua?) can resolve the
> issue:
> https://www.linuxquestions.org/questions/linux-hardware-18/corsair-flash-voyager-slider-usb-memory-stick-fails-to-attach-4175572901/
>
> Should 'alua' even be present? AFAIK it is for large infrastructure. Fedora
> installer does not seem to enable it by default.
Indeed looks like something unnecessary on desktop system.
Try adding this to kernel command line:
rd.driver.blacklist=scsi_dh_alua
- --
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
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