We've put two different tape drives on our 53c810, a DLT drive and a
DAT drive.  Both of them cause the system to pause for seconds to minutes
at a time when we're trying to do backups (using tar).  I assume this
isn't normal, but I don't know if it's a driver problem or something
else.

% cat /kern/version
NetBSD 1.5Q (LYRA) #0: Sun Dec 31 22:52:32 CST 2000
    root@solstice:/stuff/NetBSD/src/sys/arch/i386/compile/LYRA

siop0 at pci0 dev 11 function 0: Symbios Logic 53c810 (fast scsi)
siop0: interrupting at irq 10
scsibus1 at siop0: 8 targets, 8 luns per target
scsibus1: waiting 2 seconds for devices to settle...
st0 at scsibus1 target 6 lun 0: <SEAGATE, DAT    02779-XXX, 6280> SCSI2 1/sequential removable
st0: siop0: target 6 asynchronous
drive empty

The only reason for this scsi controller to exist on the machine it's on
is to do backups, so this is problematic.  It's an add on card specifically
for this motherboard (an ASUS P55T2P4 with the scsi bios built in), the
card is the SC200.  It's the only motherboard we have this can go on, so
we'd like to be able to use it, but if we can't make the pauses go away
we'll replace it with an adaptec 1542 or some other spare adapter.  The
machine is mostly doing nfs serving to NetBSD & Linux machines.

Complete dmesg:
NetBSD 1.5Q (LYRA) #0: Sun Dec 31 22:52:32 CST 2000
    root@solstice:/stuff/NetBSD/src/sys/arch/i386/compile/LYRA
cpu0: AMD K6-2+/III+ (586-class), 451.03 MHz
cpu0: features 8021bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8>
cpu0: features 8021bf<PGE,MMX>
total memory = 65152 KB
avail memory = 57736 KB
using 840 buffers containing 3360 KB of memory
BIOS32 rev. 0 found at 0xf0400
mainbus0 (root)
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled
pchb0 at pci0 dev 0 function 0
pchb0: vendor 0x8086 product 0x1250 (rev. 0x03)
pcib0 at pci0 dev 7 function 0
pcib0: vendor 0x8086 product 0x7000 (rev. 0x01)
pciide0 at pci0 dev 7 function 1: Intel 82371SB IDE Interface (PIIX3) (rev. 0x00)
pciide0: bus-master DMA support present
pciide0: primary channel wired to compatibility mode
wd0 at pciide0 channel 0 drive 0: <Maxtor 90845D4>
wd0: drive supports 16-sector PIO transfers, LBA addressing
wd0: 8063 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 16514064 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
pciide0: primary channel interrupting at irq 14
wd0(pciide0:0:0): using PIO mode 4, DMA mode 2 (using DMA data transfers)
pciide0: secondary channel wired to compatibility mode
pciide0: disabling secondary channel (no drives)
vga1 at pci0 dev 9 function 0: vendor 0x1023 product 0x9660 (rev. 0xd3)
wsdisplay0 at vga1: console (80x25, vt100 emulation)
tlp0 at pci0 dev 10 function 0: DECchip 21140A Ethernet, pass 2.2
tlp0: interrupting at irq 12
tlp0: Ethernet address 00:40:05:a3:a1:43
lxtphy0 at tlp0 phy 0: LXT970 10/100 media interface, rev. 0
lxtphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
siop0 at pci0 dev 11 function 0: Symbios Logic 53c810 (fast scsi)
siop0: interrupting at irq 10
scsibus1 at siop0: 8 targets, 8 luns per target
bha0 at pci0 dev 12 function 0: BusLogic 9xxC SCSI
bha0: interrupting at irq 11
bha0: model BT-948, firmware 5.06J
bha0: sync, parity
bha0 targ 1: sync, offset 15, period 50nsec
bha0 targ 2: sync, offset 15, period 50nsec
bha0 targ 3: sync, offset 15, period 50nsec
bha0 targ 4: sync, offset 15, period 50nsec
bha0 targ 5: sync, offset 15, period 50nsec
bha0 targ 6: sync, offset 15, period 50nsec
scsibus0 at bha0: 8 targets, 8 luns per target
isa0 at pcib0
com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo
pckbc0 at isa0 port 0x60-0x64
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
lpt0 at isa0 port 0x378-0x37b irq 7
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
sysbeep0 at pcppi0
isapnp0 at isa0 port 0x279: ISA Plug 'n Play device support
npx0 at isa0 port 0xf0-0xff: using exception 16
fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB, 80 cyl, 2 head, 18 sec
isapnp0: no ISA Plug 'n Play devices found
biomask ef65 netmask ff65 ttymask ffe7
scsibus1: waiting 2 seconds for devices to settle...
st0 at scsibus1 target 6 lun 0: <SEAGATE, DAT    02779-XXX, 6280> SCSI2 1/sequential removable
st0: siop0: target 6 asynchronous
drive empty
scsibus0: waiting 2 seconds for devices to settle...
sd1 at scsibus0 target 1 lun 0: <IBM, DNES-318350, SA30> SCSI3 0/direct fixed
sd1: 17501 MB, 11474 cyl, 10 head, 312 sec, 512 bytes/sect x 35843670 sectors
sd2 at scsibus0 target 2 lun 0: <IBM, DNES-318350, SA30> SCSI3 0/direct fixed
sd2: 17501 MB, 11474 cyl, 10 head, 312 sec, 512 bytes/sect x 35843670 sectors
sd3 at scsibus0 target 3 lun 0: <IBM, DNES-318350, SA30> SCSI3 0/direct fixed
sd3: 17501 MB, 11474 cyl, 10 head, 312 sec, 512 bytes/sect x 35843670 sectors
sd4 at scsibus0 target 4 lun 0: <IBM, DNES-318350, SA30> SCSI3 0/direct fixed
sd4: 17501 MB, 11474 cyl, 10 head, 312 sec, 512 bytes/sect x 35843670 sectors
sd5 at scsibus0 target 5 lun 0: <IBM, DNES-318350, SA30> SCSI3 0/direct fixed
sd5: 17501 MB, 11474 cyl, 10 head, 312 sec, 512 bytes/sect x 35843670 sectors
sd6 at scsibus0 target 6 lun 0: <IBM, DNES-318350, SA30> SCSI3 0/direct fixed
sd6: 17501 MB, 11474 cyl, 10 head, 312 sec, 512 bytes/sect x 35843670 sectors
Kernelized RAIDframe activated
RAID autoconfigure
Configuring raid0:
RAIDFRAME: protectedSectors is 64
RAIDFRAME: Configure (RAID Level 5): total number of sectors is 179217920 (87508 MB)
RAIDFRAME(RAID Level 5): Using 20 floating recon bufs with head sep limit 10
boot device: wd0
root on wd0a dumps on wd0b
root file system type: ffs
raid0: Device already configured!
wsdisplay0: screen 1 added (80x25, vt100 emulation)
wsdisplay0: screen 2 added (80x25, vt100 emulation)
wsdisplay0: screen 3 added (80x25, vt100 emulation)
wsdisplay0: screen 4 added (80x25, vt100 emulation)
wsmux1: connecting to wsdisplay0

Tracy J. Di Marco White
Project Vincent Systems Manager
gendalia@iastate.edu