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Re: Sony DTF drive (GY-2120/GY-8240) SCSITOOL.EXE software or info

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On Saturday, May 13, 2023 at 5:37:12 PM UTC+1, Michael Bäuerle wrote:
> Jim Cheoros wrote: 
> > 
> > I'm trying to write proprietary commands to a GY-2120 DTF drive, and 
> > to do this I need Sony's SCSITOOL.EXE software, which was released 
> > in the mid '90s and ran on Windows95 (I believe). 
> > 
> > Does anyone have this lying around somewhere?
> I can't help with that tool, but maybe with the command, see below.
> > If not, does anyone have the SCSI command manual for these devices? 
> > If I knew the CDBs required to issue the "RECOVER" command I could 
> > live without their tool.
> According to this flyer the GY-2120 should be a SCSI2 device: 
> <https://www.broadcaststore.com/pdf/model/666445/sony_gy2120.pdf> 
> 
> The SCSI2 specification does not list a RECOVER command for 
> sequential-access devices. But there is a command RECOVER BUFFERED DATA 
> defined in section 10.2.8: 
> 
> ****************************************************************************** 
> 
> 10.2.8 RECOVER BUFFERED DATA command 
> 
> The RECOVER BUFFERED DATA command (see table 184) is used to recover 
> data that has been transferred to the target's buffer but has not been 
> successfully written to the medium. It is normally used to recover from 
> error or exception conditions that make it impossible to write the 
> buffered data to the medium. One or more RECOVER BUFFERED DATA commands 
> may be required to recover all unwritten buffered data. 
> 
> Table 184 - RECOVER BUFFERED DATA command 
> ============================================================================== 
> Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | 
> Byte | | | | | | | | | 
> ============================================================================== 
> 0 | Operation Code (14h) | 
> -----|-----------------------------------------------------------------------| 
> 1 | Logical Unit Number | Reserved | SILI | Fixed | 
> -----|-----------------------------------------------------------------------| 
> 2 | Transfer Length (MSB) | 
> -----|-----------------------------------------------------------------------| 
> 3 | Transfer Length | 
> -----|-----------------------------------------------------------------------| 
> 4 | Transfer Length (LSB) | 
> -----|-----------------------------------------------------------------------| 
> 5 | Control | 
> ============================================================================== 
> 
> ****************************************************************************** 
> 
> Is this the command you are searching for?

Thanks for the reply - but no!

According to figure 7-1 of the maintenance manual, the CDB[0]opcode for "Recover" is "E9H", ie in the 7f-ff range of proprietary manufacturer commands. I don't seem to be able to include an image or attachment, but you can see reference to this here:

https://www.manualslib.com/manual/2348306/Sony-Gy-2120wd.html?page=48#manual

When a tape isn't unloaded "properly", the NFC chip on the tape isn't updated, and the only way you can mount the tape again is to "recover" it first.

There's two ways of doing this - the first is by depressing a little microswitch recessed in the front panel, but the drive ignores me when I do this.

The second way is to use their SCSITOOL.EXE software to issue the "RECOVER" command.

Thanks again.

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Sony DTF drive (GY-2120/GY-8240) SCSITOOL.EXE software or info Jim Cheoros <jimcheoros@gmail.com> - 2023-05-12 16:39 -0700
  Re: Sony DTF drive (GY-2120/GY-8240) SCSITOOL.EXE software or info Michael Bäuerle <michael.baeuerle@gmx.net> - 2023-05-13 18:35 +0200
    Re: Sony DTF drive (GY-2120/GY-8240) SCSITOOL.EXE software or info Jim Cheoros <jimcheoros@gmail.com> - 2023-05-13 11:03 -0700

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