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- Path: po.CWRU.Edu!njg2
- From: njg2@po.CWRU.Edu (J. Norell Guttman)
- Newsgroups: comp.sys.amiga.emulations
- Subject: empscsi w/Syq & CDROM on AMI side
- Date: 15 Mar 1996 23:26:42 GMT
- Organization: Case Western Reserve University, Cleveland, OH (USA)
- Message-ID: <4icubi$im5@madeline.INS.CWRU.Edu>
- Reply-To: jchuck01@barney.poly.edu
- NNTP-Posting-Host: kanga.ins.cwru.edu
-
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-
- I have 2 problems when using the emplants scsi on the ami side of my
- A4000/040, OS31. One is with a 5.25in ext Syq 88 and the other with a 2x NEC
- ext cdrom which are chained together, the Syq properly terminated.
-
- Regrading the Syq. Can someone tell me what max-xfer & mask value settings
- are appropriate to use? I could be preparing the carts wrong. Heres what I do
- and the problem that occurs.
-
- The emplant scsi controller has the latest chip and '.device' software. 1st
- I use HDToolBox and define a new type for the cart, then I low-lev format, then
- I go to partition and make one 88 meg partition and set the filesystem for
- DC-FFS. I then save changes and exit HDToolBox.
-
- Now i use scsimounter to mount the drive, then I tried to format the disk
- when the icon appeared on the workbench, but as it got 1/2 way through, it quit
- saying it couldn't format one of the cylinders. I tried twice.
-
- Well the cart was fine when the Syq was on a PC (and it was previously an
- formatted Amiga anyways) so I know its good. SO I brought it to my frineds 3000
- OS31 hook up the Syq there, use HDToolBox there to prep it, then format it there
- and it formats fine. So I can now mount it on my 4000 with scsimounter and use
- it, but, sometimes on reads or writes of big files, it 'freezes' the computer
- momentarily until its done with the packet, but yesterday, when I had 3 DCC
- sends going from the Syq it 'froze' the computer and wouldn't release till I
- finally hit the eject button on the drive. I put the disk back in and the xfer
- continued and only one file got corrupted needless to say. I believe that its a
- problem of simply tweaking the mask/xfer values, but since I dont have any
- manuals for the drive, I don't know its specs.
-
- The values that are currently in there now are 0x0fffffe=Mask,
- 0xffffff=Max-xfer file system block-size=512 and buffers=30 as set and
- reported by HDToolBox. There are other values like stacksize, priority,
- prealloc, interleave and buffermemtype which I dont really know how they work.
- Their values are 600, 10, 0, 0 and 0 respectively as reported by a 'GenML'
- created mountlist.
-
- If anyone has any experience or a mountlist for a similar setup and isn't
- having any problems, please respond here or via email.
-
- The 2nd question is more OS related. From what i understand, OS31 supports
- CD-ROMS natively through the CD0 dosdriver, but what I want to know is does
- that include a CD-ROM hooked up via the emplants scsi port, or only CD-ROMS
- hooked up through the built in scsi.device.
-
- I edited the dosdriver and put in empscsi.device and the unit # of the
- CD-ROM but it won't mount a cover CD I got from Amiga Format. When I double
- click the dosdriver and try to cd to CD0: i get an error saying NDOS. Also,
- using scsimounter to try and mount the CD gives me an error 'invalid rigid
- disk block'.
-
- I heard some stuff about there being a bug in v40.70 of OS31 with respect to
- CD-ROMS, but don't know the facts about this.
-
- Any insights on either of these problems would be greatly appreciated.
-
- Thanks.
- Jim
-
-