IIRC the bad blocks from the label of the drive needed to either be 
manually entered into a bad block track, or you had to run a diagnostic to 
test each sector and create the table for you. Then the drive should work. 
I believe that rabads was only used on drives that developed bad blocks 
while holding a "live" file system.

--Chuck

At 09:58 AM 8/8/2004, Kirk Russell wrote:
>Hello,
>
>I found a ST-225 drive at a local hardware surplus.  First I initialized
>the drive with a RQDX3 controller:
>- changed the drive select from 1 to 3
>- put a PDP11/23+ in the BA23 enclosure
>- run XXDP's ZRQC??.BIN on the RD31 -- seemed to work okay
>
>I replaced the PDP11/23+ with a KA640-A, in the same BA23 enclosure.  And
>netbooted NetBSD 1.6.  There appears to be some bad blocks:
>
>ra0: drive 0 soft error datagram: unit 0: small disk error, cyl 35: data 
>error (uncorrectable ecc) (code 8, subcode 7)
>ra0: drive 0 soft error datagram: unit 0: small disk error, cyl 39: data 
>error (uncorrectable ecc) (code 8, subcode 7)
>ra0: drive 0 soft error datagram: unit 0: small disk error, cyl 41: data 
>error (uncorrectable ecc) (code 8, subcode 7)
>ra0: drive 0 soft error datagram: unit 0: small disk error, cyl 563: data 
>error (uncorrectable ecc) (code 8, subcode 7)
>
>I assume you have to run rabads to replace the blocks:
>- get rabads from
> 
>http://highgate.comm.sfu.ca/pups/4BSD/Distributions/odds-ends/rabads.a.out
>- still using the same RQDX3 controller
>- netboot rabads
>
>I cannot get rabads to find the RQDX3 controller.  What am I missing?  TIA.
>
>KA640-A V4.1, VMB 2.5
>Performing normal system tests.
>41..40..39..38..37..36..35..34..33..32..31..30..29..28..27..26..
>25..24..23..22..21..20..19..18..17..16..15..14..13..
>
>?40 1 07 FF 00 0000
>12..11..10..
>09..08..07..06..05..04..03..
>Tests completed.
> >>>show qbus
>Scan of Qbus I/O Space
>-20001468 (772150) = FFFF (154) RQDX3/KDA50/RRD50/RQC25/KFQSA-DISK
>-2000146A (772152) = 0B40
>-20001900 (774400) = 0080 (160) RLV12
>-20001902 (774402) = 0000
>-20001904 (774404) = 0000
>-20001906 (774406) = 7FFF
>-20001F40 (777500) = 0020 (004) IPCR
>
>Scan of Qbus Memory Space
> >>>show UQSSP
>UQSSP Disk Controller 0 (772150)
>-DUA0 (RD31)
>-DUA1 (RX50)
>-DUA2 (RX50)
> >>>boot esa0:
>(BOOT/R5:0 ESA0)
>
>
>
>   2..
>-ESA0
>   1..0..
>
>
> >> NetBSD/vax boot [Nov 17 2000 07:23:42] <<
> >> Press any key to abort autoboot 4
>Press '?' for help
> > boot rabads
>Trying BOOTP
>Using IP address: 192.168.1.113
>myip: tinvax (192.168.1.113)
>root addr=192.168.1.201 path=/export/netboot/tinvax/root
>57308+0+0 total=0xdfe0
>
>
>ULTRIX DSA Disk Initialization Program
>
>rabads <help exit drives status table init replace>: init
>
>Enter UBA number ( 0 - 7 )  < 0 >: 0
>
>Enter controller CSR (in octal) < 172150 >: 772150
>CSR address too large!
>
>Enter controller CSR (in octal) < 172150 >: 172150
>
>Enter unit number ( 0 - 7 )  < 0 >: 0
>
>?12 DBL ERR2
>         PC = EF00FB14
> >>>
>
>--
>Kirk Russell                  http://www.employees.org/~kirk/