home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.periphs.scsi
- Path: sparky!uunet!gumby!wupost!csus.edu!netcom.com!rabel
- From: rabel@netcom.com (Robert Abeles)
- Subject: Re: WANGTEK info??
- Message-ID: <1992Nov16.185417.20456@netcom.com>
- Organization: Netcom - Online Communication Services (408 241-9760 guest)
- References: <92321.110741WIS@LIVERPOOL.AC.UK>
- Date: Mon, 16 Nov 1992 18:54:17 GMT
- Lines: 23
-
- WIS@LIVERPOOL.AC.UK writes:
-
- >Can someone tell me what the 02h and 0Ch vendor specific commands do
- >to WANGTEK tape units. I'm playing around with some tape backup software
- >- the 02h command reads in 3 bytes and the 0Ch command doesn't read or
- >write anything, but byte 5 in the 6 byte command structure varies. My
- >guess is that these may be positioning commands of some sort (one to
- >read and one to set?) but any info would be gratefully received!
-
- >Thanks in advance
-
- >Bill Sellers (wis@uxb.liv.ac.uk)
- Code x'02' is a Request Block Address. The 3 bytes returned are the
- block address, MSB to LSB. Byte 4 of the CDB must contain the allocation
- length, x'03'.
- Code x'0C' is a Seek Block. Bytes 2 to 4 of the CDB specify the block
- address. Bit 0 of byte 1 of the CDB specifies IMM--If it is 1, status
- is returned at the start of the operation, if it is 0, status is returned
- after the seek is concluded.
- --
- --------------------------------------
- - Bob Abeles, rabel@netcom.com -
- --------------------------------------
-