Conference hydra::amiga_v1

2445.0. "Adding a second ST-506 on an A2090A" by MQOFS::DESROSIERS (Lets procrastinate....tomorrow) Thu Apr 06 1989 14:23

To add a second ST-506 drive to an A2090A controller, I did the following:

1- My first drive, a Seagate ST-225, was partitionned as "DH0" in OFS (old
   file system) and "DH1" in FFS (fast file system).  The partitions were
   naturraly named "dh0" and "dh1".  The first thing to do is to RELABEL
   "dh1" to "di0" or any other name, except "dh1".  This is because the 
   second drive (unit 2) will be reffered to as DH1 by AmigaDOS thus 
   confusing path names.

2- Plug in the second drive.  The 34 pin cable is daisy chained from the
   first drive, and the 20 pin cable plugs into the unused 20 pin header
   on the A2090A.  I set up the switches on my second drive, an RD-51 like
   this: 
		
		1111111
		65432109
		--------
	       |	|
	       |occcccco|	o = open, c = closed
	       |	|
		--------
		12345678
   
   which translates to: select unit 0

3- Next power up and boot from a workbench floppy that has "prep" on it as
   well as the following mountlist:


/* ST-506 hard disk drives are units 1 and 2 */

RES0:      Device = hddisk.device
           Unit   = 1
           Flags  = 0
           Surfaces  = 4
           BlocksPerTrack = 17
           Reserved = 0
           Interleave = 0
           LowCyl = 0  ;  HighCyl = 1
           Buffers = 1
           BufMemType = 4
#


RES1:      Device = hddisk.device
           Unit   = 2
           Flags  = 0
           Surfaces  = 4
           BlocksPerTrack = 17
           Reserved = 0
           Interleave = 0
           LowCyl = 0  ;  HighCyl = 1
           Buffers = 1
	   BufMemType = 4
#


DI0:
    Device = hddisk.device
    FileSystem = l:FastFileSystem
    Unit   = 1
    Flags  = 0
    Surfaces  = 4
    BlocksPerTrack = 17
    Reserved = 2
    Interleave = 0
    LowCyl = 33  ;  HighCyl = 612
    Buffers = 30
    GlobVec = -1
    BufMemType = 4
    Mount = 1
    DosType = 0x444F5301
    StackSize = 4000
#

DI1:
    Device = hddisk.device
    FileSystem = l:FastFileSystem
    Unit   = 2
    Flags  = 0
    Surfaces  = 4
    BlocksPerTrack = 17
    Reserved = 2
    Interleave = 0
    LowCyl = 3  ;  HighCyl = 300
    Buffers = 30
    GlobVec = -1
    BufMemType = 4
    Mount = 1
    DosType = 0x444F5301
    StackSize = 4000
#

4- Now issue the following commands from the CLI: MOUNT RES1:
						  PREP  RES1:
   
   The RD-51 is prepped as generic 10 meg 4 heads drive.

5- Reeboot the workbench disk and again from the CLI:

	FORMAT DI1: name "DI1" FFS Noicons

6- When the format has finished, you can "autoboot" and the new drive will
   be seen.


All this for 10 meg! but what the h, it was free.

Jean