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nusb/disk: allow 12 and 16 byte raw scsi commands (from erik quanstro)

--- a/sys/src/cmd/nusb/disk/disk.c

+++ b/sys/src/cmd/nusb/disk/disk.c

@@ -812,7 +812,7 @@

 		}

 		switch(lun->phase){

 		case Pcmd:

-			if(count != 6 && count != 10){

+			if(count != 6 && count != 10 && count != 12 && count != 16){

 				respond(req, "bad command length");

 				break;

 			}

--- a/sys/src/cmd/nusb/disk/ums.h

+++ b/sys/src/cmd/nusb/disk/ums.h

@@ -79,7 +79,7 @@

 	/* partitions */

 	Part part[Maxparts];

-	uchar 	rawcmd[10];

+	uchar 	rawcmd[16];

 	uchar	phase;

 	char	*inq;

 	Ums	*ums;

-- 

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