| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1823.1 | Expect a 10 second delay from powerup | TLE::RMEYERS | Randy Meyers | Thu Oct 27 1988 15:59 | 23 |
| Re: .0
Not directly speaking to the question, but Commodore has announced that
you can not boot from a Seagate SCSI drive using their 2090A controller.
A future revision of the boot code ROMs on the controller will fix that
problem, but Commodore hasn't announced when controllers with the
new ROMs will ship, or if upgraded ROMs will be offered for free or
inexpensively to owners of the current 2090A.
SCSI disk are intelligent devices with the actual disk controller on
the disk and the on-disk controller capable of handing a fairly complex
communications protocol. Seagate evidently does not ROM the SCSI code
for their drives. Instead, the drive starts up an reads the SCSI
controller code from special tracks on the disk into on disk RAM.
The problem is the Seagate disks must boot themselves (5 to 15 seconds)
before they can boot the Amiga.
If ten years ago people told me that in the future that disk drives
and printers would be intelligent devices that had be to booted before
you could use them, I'd laughed.
Ha, Ha.
|
| 1823.2 | | WJG::GUINEAU | | Fri Oct 28 1988 09:21 | 10 |
|
Seagate is not the only one. DEC RZ22 and RZ23 drives do the same thing.
Both are from Conner Peripherals, 50Mb and 100Mb respectivly, both 3.5" SCSI.
They have some commands in ROM also. This way they can respond almost
immediatly on the bus (INQUIRY, TEST UNIT READY, START/STOP UNIT..). However
the drive is not "ready" until spun up and it's RAM code loaded.
John
|
| 1823.3 | DEC RD33 | ALAZIF::WHERRY | Celebrate Gotham's Tricentennial | Wed Feb 08 1989 15:59 | 9 |
|
Does anybody have any info on the DEC RD33? Like platters, heads,
cylinders, tracks, etc... All the info one would need to format
and use one on an amiga.
thanks.
brad
|
| 1823.4 | Dead Duck | WJG::GUINEAU | | Wed Feb 08 1989 18:04 | 10 |
|
The DEC RD33 no longer exists. The project was canceled.
Anyway it has 7 heads, 1170 cylinders. It's ST506 so the number
of sectors depends on the controller you use. (Try 16-18).
It's 25ms ave access, 5ms track to track.
John
|