RES: Problem with USB-to-SATA adapters (was: AS2105-based enclosure size issues with >2TB HDDs)

Alfredo Dal Ava Junior
2014-09-03T19:17:52Z

On Sat, 30 Aug 2014, Matthew Dharm wrote
> I was thinking of something that could notice a USB device which is formatted
> NTFS and has a partition table and filesystem that indicates a much bigger
> capacity than what the drive reports. Under this circumstances, you could do
> something like pop-up a dialog box saying "this drive is confused -- is it 2TB or
> 3TB?"
>
> Well, maybe that would say "Drive capacity is not consistent with partition
> table. This can happen with certain USB drives designed for use with
> Windows. Override drive capacity (emulating Windows)?"
>
> You could imagine increasing complex heuristics to try to detect this scenario.
> Even without an automated helper program to do it, if there was a sysfs
> interface then when we got the periodic e-mails reporting this same type of
> problem, we could offer a quick-and-clean solution.

Hi Matt,

I did small hack to skip is_pte_valid() on efi.c and now I have sdc1 partition listed on /proc/partition, but I hit other issue: ntfs-3g mount userspace tool that comes with Fedora now fails with "Failed to read last sector (7814037100): Invalid argument". I also tried to override disk capacity, but SD driver fails with "Invalid command failure" and "Illegal Request" (I'll investigate it later)

Many places rely on disk capacity value, I think emulate Windows behavior for these HDD docks will not be an easy task....

[]'s
Alfredo