On Thu, Nov 15, 2012 at 4:20 AM, Christoph Hellwig <[email protected]> wrote: > On Wed, Nov 14, 2012 at 05:03:22PM -0500, Jason J. Herne wrote: >> From: "Jason J. Herne" <[email protected]> >> >> Force large capacity (> 0xFFFFFFFF blocks) drives to use READ/WRITE(16) >> instead >> of READ/WRITE(10). Some(most/all?) USB enclosures do not like READ(10) >> commands >> when a large capacity drive is installed. This issue was reported and >> discussed >> here: http://marc.info/?l=linux-usb&m=135247705222324&w=2 > > Is there any reason not to simply use the 16 byte command > unconditionally for large devices? >
What you are suggesting is exactly what this patch is doing. Code was added to sd_read_capacity() to turn on the new bit if the device has more than 2^32 blocks. -- - Jason J. Herne ([email protected]) -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
