Hi,

I'm running XenServer 7.0.0. I tried to add the fourth, the fifth, and 
the sixth drive to a FreeBSD VM running stable/11 r308642, with the 
(almost unrelated) patch from r308126 applied.

The problem is that only the first three drives gets attached, the 
last three drives are detected, but not acted upon:

xbd0: 12288MB <Virtual Block Device> at device/vbd/832 on xenbusb_front0
xbd0: attaching as ada1
xbd0: features: write_barrier
xbd0: synchronize cache commands enabled.
xbd1: 12288MB <Virtual Block Device> at device/vbd/768 on xenbusb_front0
xbd1: attaching as ada0
xbd1: features: write_barrier
xbd1: synchronize cache commands enabled.
xbd2: 12288MB <Virtual Block Device> at device/vbd/5632 on xenbusb_front0
xbd2: attaching as ada2
xbd2: features: write_barrier
xbd2: synchronize cache commands enabled.
xbd4: 2048MB <Virtual Block Device> at device/vbd/51776 on xenbusb_front0
xbd4: features: write_barrier
xbd4: synchronize cache commands enabled.
xbd5: 2048MB <Virtual Block Device> at device/vbd/51792 on xenbusb_front0
xbd5: features: write_barrier
xbd5: synchronize cache commands enabled.
xbd6: 2048MB <Virtual Block Device> at device/vbd/51808 on xenbusb_front0
xbd6: features: write_barrier
xbd6: synchronize cache commands enabled.

Can we get the three remaining drives attached as ada3, ada4, and 
ada5?

Also, why is the naming of the device files inconsistent with the 
drive order?

xbd0 => ada1
xbd1 => ada0
xbd2 => ada2 <= This one's consistent, but that's probably by accident.

Are the drives 0, 1, 2, 4, 5, and 6, as shown in XenCenter, really 
xbd0, xbd1, xbd2, xbd4, xbd5, xbd6?

Wouldn't this mapping make more sense:

xbd0 => ada0
xbd1 => ada1
xbd2 => ada2
xbd4 => ada3
xbd5 => ada4
xbd6 => ada5

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