Replace 3.5" drives in HP9122D/HP9133H

Joe R. rigdonj at cfl.rr.com
Wed Feb 15 15:43:08 CST 2006


At 10:13 AM 2/15/06 +0200, you wrote:
>I am wondering whether it is possible to replace the ailing Sony 3.5"
>disc drives in both my HP9122D and HP9133H HP-IB units with PC 3.5"
>drives?

   Not a chance!  Tony Duell can give you all the technical details but the
short version is that drives are completely different. The good news is
that 9122 and compatible drives are frequently cheap on E-bay and in
surplus stores.

      Joe



>
>These are the older Sony 3/4 height units with separate data & power
>connectors, model OA-D32W-10 (double sided). The data connector has 26
>pins. The power connector is standard 4 pin.
>
>I located the pin-outs for these drives on a Japanese site, and found
>that I could match all but 3 signals to a 'standard' 3.5" disc drive: 
>
>SONY OA-D32W-10				STANDARD
>
>1 Motor On			----->	10	/MOTEA - 0=Motor Enable
>Drive 0
>2 Drive Select 0		----->	14	/DRVSB - Drive Select 0
>3 Disk Change		----->	34	/DSKCHG - 1=Disk Change/0=Ready
>4 Drive Select 1		----->	12	/DRVSB - Drive Select 1
>
>5 Disk Change Reset	----->	????
>	
>6 Direction Select	----->	18	/DIR - 0=Direction Select
>7 GND				----->	GND	
>8 Step			----->	20	/Step - 0=Head Step
>9 GND				----->	GND	
>10 Write Data		----->	22	/WDATE - Write Data
>11 GND			----->	GND	
>12 Write Gate		----->	24	/WGATE - Floppy Write Enable,
>0=Write Gate
>13 GND			----->	GND
>	
>14 Head Read		----->	????
>	
>15 GND			----->	GND	
>16 Head Select		----->	32	/SIDE1 - 0=Head Select
>17 GND			----->	GND	
>18 Index			----->	8	/Index - 0=Index
>19 GND			----->	GND	
>20 Track 00			----->	26	/TRK00 - 0=Track 00
>21 GND			----->	GND	
>22 Write Protected	----->	28	/WPT - 0=Write Protect
>23 GND			----->	GND	
>24 Read Data		----->	30	/RDATA - Read Data
>25 GND			----->	GND
>	
>26 Ready			----->	????	
>
>Is such a retro-fitting exercise possible? One possible problem could be
>the rotational speed; I know the Sony drives spun at 600rpm as opposed
>to the PC standard 300rpm... Any comments and/or suggestions about the
>feasibility, as well as matching the signals of pins 5, 14, and 26?
>
>Cheers
>
>Glen.
>




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