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- Path: erinews.ericsson.se!usenet
- From: etxzayl@cate1.ericsson.se (Johan Zeylon IN/SA/BIB)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: SCSI question #4376:-}
- Date: 18 Jan 1996 20:04:04 GMT
- Organization: Ericsson Telecom AB
- Message-ID: <4dm93k$9t8@erinews.ericsson.se>
- References: <4dk5r2$5l4@ansel.intersource.com>
- Reply-To: etxzayl@cate1.ericsson.se
- NNTP-Posting-Host: dill.ericsson.se
-
- In article 5l4@ansel.intersource.com, rhays@ansel.intersource.com (Rob Hays) writes:
- >I have an A3000 to which I have added a Syquest 105 drive internally in
- >the spot intended for the second floppy drive. When I boot, if there
- >is no cartridge in the Syquest, the system waits approx 30 seconds before
- >booting from the boot partition of the internal hard drive.
- >
- >The SCSI id of the Syquest was 0 and the internal hd was 6. If a
- >cartridge is in the Syquest, the system boots normally from the hd.
- >
- >I recently changed the hd for a new unit, and at the same time set the
- >new hd id to 0 and the Syquest id to 6 thinking that this would cure the
- >above behavior, but it didn't. Exactly the same thing happens on a boot.
- >I've tried various boot priority values for the boot partition on the hd,
- >but no change.
- >
- >This happens both on cold and warm boots.
- >
- >Any ideas?
- >
- >Thanks,
- >
- >Rob Hays
- >
-
- You were thinkng in the right way when you changed the ID's.
- But you have to do a couple of more things.
- 1. Get "RDBflags" ,"SCSIprefs" and "SCSImounter" from AmiNet.
- 2: Use SCSIprefs to change the timeout value for the controller to the
- short one. Also clear the flag "support multiple LUN's" if you dant have any
- devices that use multiple LUN's. This is usually true if you don't have a
- CD-changer. This will speed up the scan at powerup when all addresses on
- the SCSI bus are scanned. But it might not work if you have HD's that spin
- up very slowly. In that case, use long timeout. This is the case if the machine
- only boots OK at a warm boot. i.e. Reset.
- 3. Use RDBflags to set "LASTDISK" and "LASTTARGET" on your last HD.
- This will tell the Amiga to skip all other drives and boot immediately.
- HDToolbox doesn't know the difference between different types of SCSI
- devices. If only have HD's or if a HD has the last address, HDToolbox will
- set LASTDISK and LASTTARGET on it. But if the last unit is a CD-ROM for
- instance, HDToolbox will try to write these flags to it and fail and not
- give you any error messages. The Amiga will then scan the entire bus the
- next time you boot it, this will in the worst case cause a delay of 30 secs.
- 4. Add SCSImounter early in your startup-sequence.
- This will mount your Syquest. Since the Syquest isn't automounted because
- of the the flags on the HD.
-
- This method is useful when you have anything with removable media on your
- SCSI bus. Like ZIP, Syquest, CD-ROM, Tape drive and so on.
-
- For instance, my bus looks like this: (I don't need SCSImounter)
- Addr. Unit.
- 0 1.08Gb HD
- 1 240Mb HD
- 2 I had a 210Mb HD here until recently.
- 3 52Mb HD <--- LASTDISK/LASTTARGET
- 4 CD-ROM
- 5 QIC-250 Tape drive
-
- OR:
- (I haven't tried this, but it might be a better solution in your case)
- Syquest at id 0, HD at id 1.
- LASTDISK/LASTTARGET on HD.
- No multiple LUN support.
- Short SCSI bus timeout.
- No SCSImounter in startup-sequence.
-
- I don't know if the Syquest will be automounted if it hasn't any media in it.
- Try it out. You can't break anything.
-
- Regards/ Johan
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