[Bug 12207] block reads/writes > 122880 bytes to USB tape drive gives EBUSY

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http://bugzilla.kernel.org/show_bug.cgi?id=12207


kai.makisara@xxxxxxxxxxx changed:

           What    |Removed                     |Added
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                 CC|                            |kai.makisara@xxxxxxxxxxx




------- Comment #3 from kai.makisara@xxxxxxxxxxx  2008-12-22 23:30 -------
I have been testing large blocks with 2.6.27.7 and I was able to reach 6 MB
without any tricks. The difference between your system and mine is that my tape
is connected with SCSI and yours is with USB.

Looking at linux/drivers/usb/storage/scsiglue,c I find the following:

        /* limit the total size of a transfer to 120 KB */
        .max_sectors =                  240,

Maybe the USB experts can tell what is the reason for this.


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