I'm using two tekram 390F controllers (and had previously tried the
Tekram 390U2W controller) with NetBSD, but I'm getting nothing but
grief from my IBM LVD DMVS18V drives, of which three are installed;
an exceprt from my very long dmesg follows...

(Note that I get practically identical results with 1.4.2ALPHA.)

ncr1 at pci0 dev 10 function 0: ncr 53c895 fast40 wide scsi
ncr1: interrupting at irq 11
ncr1: minsync=10, maxsync=137, maxoffs=31, 128 dwords burst, large dma fifo
ncr1: single-ended, open drain IRQ driver, using on-chip SRAM
ncr1: restart (scsi reset).
scsibus1 at ncr1: 16 targets, 8 luns per target
probe(ncr1:2:0): WIDE SCSI (16 bit) enabled
probe(ncr1:2:0): 10.0 MB/s (200 ns, offset 31)
sd2 at scsibus1 targ 2 lun 0: <IBM, DMVS18V, 0100> SCSI3 0/direct fixed
sd2(ncr1:2:0): WIDE SCSI (16 bit) enabled
sd2(ncr1:2:0): 40.0 MB/s (50 ns, offset 31)
sd2: 17501MB, 11736 cyl, 10 head, 305 sec, 512 bytes/sect x 35843670 sectors
ncr1:2: ERROR (0:4) (8-0-0) (1f/bf) @ (scripth 6d0:878b0000).
ncr1: script cmd = 80080000
ncr1: regdump: ca 00 80 bf 47 1f 02 03 02 08 82 00 80 00 0f 02.
ncr1: have to clear fifos.
ncr1:2: ERROR (0:1) (8-0-0) (1f/bf) @ (script 3f0:878b0000).
ncr1: script cmd = 72100000
ncr1: regdump: ca 00 80 bf 47 1f 02 03 02 08 82 00 80 00 0f 02.
ncr1: have to clear fifos.
ncr1: restart (fatal error).
[...]
probe(ncr1:2:7): COMMAND FAILED (9 2) @0xf0a77400.
probe(ncr1:2:7): WIDE SCSI (16 bit) enabled
probe(ncr1:3:0): WIDE SCSI (16 bit) enabled
probe(ncr1:3:0): 10.0 MB/s (200 ns, offset 31)
sd3 at scsibus1 targ 3 lun 0: <IBM, DMVS18V, 0100> SCSI3 0/direct fixed
sd3(ncr1:3:0): WIDE SCSI (16 bit) enabled
sd3(ncr1:3:0): 40.0 MB/s (50 ns, offset 31)
sd3: 17501MB, 11736 cyl, 10 head, 305 sec, 512 bytes/sect x 35843670 sectors
ncr1:3: ERROR (0:4) (8-0-0) (1f/bf) @ (scripth 6d0:878b0000).
ncr1: script cmd = 80080000
ncr1: regdump: ca 00 80 bf 47 1f 03 03 03 08 00 00 80 00 0f 02.
ncr1: have to clear fifos.
ncr1:3: ERROR (0:1) (8-0-0) (1f/bf) @ (script 3f0:878b0000).
ncr1: script cmd = 72100000
ncr1: regdump: ca 00 80 bf 47 1f 03 03 03 08 00 00 80 00 0f 02.
ncr1: have to clear fifos.
ncr1: restart (fatal error).
probe(ncr1:3:1): COMMAND FAILED (9 2) @0xf0a77400.
probe(ncr1:3:1): WIDE SCSI (16 bit) enabled
ncr1:3: ERROR (0:4) (8-0-0) (0/7) @ (scripth 6d0:878b0000).
ncr1: script cmd = 80080000
ncr1: regdump: ca 00 80 07 47 00 03 03 03 08 00 00 80 00 0f 02.
ncr1: have to clear fifos.
ncr1:3: ERROR (0:1) (8-0-0) (0/7) @ (script 3f0:878b0000).
ncr1: script cmd = 72100000
ncr1: regdump: ca 00 80 07 47 00 03 03 03 08 00 00 80 00 0f 02.
ncr1: have to clear fifos.
ncr1: restart (fatal error).
probe(ncr1:3:1): COMMAND FAILED (9 2) @0xf0a77400.
probe(ncr1:3:1): WIDE SCSI (16 bit) enabled
ncr1:3: ERROR (0:4) (8-0-0) (0/7) @ (scripth 6d0:878b0000).
ncr1: script cmd = 80080000
ncr1: regdump: ca 00 80 07 47 00 03 03 03 08 00 00 80 00 0f 02.
ncr1: have to clear fifos.
ncr1:3: ERROR (0:1) (8-0-0) (0/7) @ (script 3f0:878b0000).
ncr1: script cmd = 72100000
ncr1: regdump: ca 00 80 07 47 00 03 03 03 08 00 00 80 00 0f 02.
ncr1: have to clear fifos.
ncr1: restart (fatal error).
probe(ncr1:3:1): COMMAND FAILED (9 2) @0xf0a77400.