> Some modern disks use the "UASP" protocol in preference to the
> traditional bulk-only mass storage protocol supported by the Plan
> 9 usbdisk driver. Even if the disk also supports bulk-only, the
> existing driver won't try to pick an alternate configuration to
> force the disk to fall back to that protocol. Below is a patch
> (tested on only one drive, as far as I know) which will make it do
> that.
Richards that patch makes other devices to not work, have you tested
it after compiling all usb and kernel? The test for storage and
bulk is done in usb/disk.c. Adding Protouas to the test solve the
problem. This is done also in 9front.
Regards,
adr.
diff -urP /n/img/sys/src/cmd/usb/disk/disk.c /sys/src/cmd/usb/disk/disk.c
--- /n/img/sys/src/cmd/usb/disk/disk.c Tue Dec 13 23:35:47 2011
+++ /sys/src/cmd/usb/disk/disk.c Sat Jun 19 10:45:37 2021
@@ -663,7 +663,7 @@
continue;
csp = ep->iface->csp;
sc = Subclass(csp);
- if(!(Class(csp) == Clstorage && (Proto(csp) == Protobulk)))
+ if(!(Class(csp) == Clstorage && (Proto(csp) == Protobulk ||
Proto(csp) == Protouas)))
continue;
if(sc != Subatapi && sc != Sub8070 && sc != Subscsi)
fprint(2, "disk: subclass %#ulx not supported. trying
anyway\n", sc);
diff -urP /n/img/sys/src/cmd/usb/disk/ums.h /sys/src/cmd/usb/disk/ums.h
--- /n/img/sys/src/cmd/usb/disk/ums.h Wed Feb 13 21:22:23 2013
+++ /sys/src/cmd/usb/disk/ums.h Sat Jun 19 10:44:13 2021
@@ -13,6 +13,7 @@
Protocbi = 0, /* control/bulk/interrupt; mainly floppies */
Protocb = 1, /* " with no interrupt; mainly floppies */
Protobulk = 0x50, /* bulk only */
+ Protouas = 0x62, /* USB-attached SCSI */
Subrbc = 1, /* reduced blk cmds */
Subatapi = 2, /* cd/dvd using sff-8020i or mmc-2 cmd blks */
------------------------------------------
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