Subject: Re: unusual panics on NetBSD/alpha 3.0_* and 4.0_BETA
To: Eric Schnoebelen <eric@cirr.com>
From: Jason Thorpe <thorpej@shagadelic.org>
List: tech-kern
Date: 10/06/2006 22:03:36
On Oct 6, 2006, at 8:32 PM, Eric Schnoebelen wrote:
> Gentlebeings;
>
> I'm running NetBSD/alpha on an assortment of alpha
> hardware, but mostly DS10L's. One of them, running 3.0_STABLE
> (circa 26 July 2006) is seeing the following panics on a
> semi-regular basis: (dmesg in the first attachment)
Please file a PR using send-pr and include this information. It
points to a bug in the SACK code.
Thanks!
>
> [-- eric@localhost attached -- Tue Sep 26 19:09:14 2006]
> db> bt
> cpu_Debugger() at netbsd:cpu_Debugger+0x4
> panic() at netbsd:panic+0x1f8
> trap() at netbsd:trap+0x120
> XentUna() at netbsd:XentUna+0x20
> --- unaligned access fault (from ipl 1) ---
> tcp_sack_option() at netbsd:tcp_sack_option+0x13c
> tcp_dooptions() at netbsd:tcp_dooptions+0x278
> tcp_input() at netbsd:tcp_input+0xa20
> ip_input() at netbsd:ip_input+0xb4c
> ipintr() at netbsd:ipintr+0xa0
> netintr() at netbsd:netintr+0x158
> softintr_dispatch() at netbsd:softintr_dispatch+0x160
> exception_return() at netbsd:exception_return+0x7c
> --- root of call graph ---
>
> [-- eric@localhost attached -- Mon Aug 21 00:39:48 2006]
> db> bt
> cpu_Debugger() at netbsd:cpu_Debugger+0x4
> panic() at netbsd:panic+0x1f8
> pool_get() at netbsd:pool_get+0x1b8
> pool_cache_get_paddr() at netbsd:pool_cache_get_paddr+0x170
> pmap_lev1map_create() at netbsd:pmap_lev1map_create+0x80
> pmap_create() at netbsd:pmap_create+0xe4
> uvmspace_init() at netbsd:uvmspace_init+0xa8
> uvmspace_alloc() at netbsd:uvmspace_alloc+0x58
> uvmspace_exec() at netbsd:uvmspace_exec+0x54
> sys_execve() at netbsd:sys_execve+0x6e0
> syscall_plain() at netbsd:syscall_plain+0xc4
> XentSys() at netbsd:XentSys+0x5c
> --- syscall (59) ---
> --- user mode ---
>
> [-- eric@localhost attached -- Thu Aug 10 22:37:52 2006]
> db> bt
> cpu_Debugger() at netbsd:cpu_Debugger+0x4
> panic() at netbsd:panic+0x1f8
> trap() at netbsd:trap+0x120
> XentUna() at netbsd:XentUna+0x20
> --- unaligned access fault (from ipl 1) ---
> tcp_sack_option() at netbsd:tcp_sack_option+0x13c
> tcp_dooptions() at netbsd:tcp_dooptions+0x278
> tcp_input() at netbsd:tcp_input+0xa20
> ip_input() at netbsd:ip_input+0xb4c
> ipintr() at netbsd:ipintr+0xa0
> netintr() at netbsd:netintr+0x158
> softintr_dispatch() at netbsd:softintr_dispatch+0x160
> exception_return() at netbsd:exception_return+0x7c
> --- root of call graph ---
>
> [-- eric@localhost attached -- Thu Aug 10 14:33:47 2006]
> db> bt
> cpu_Debugger() at netbsd:cpu_Debugger+0x4
> panic() at netbsd:panic+0x1f8
> trap() at netbsd:trap+0x120
> XentUna() at netbsd:XentUna+0x20
> --- unaligned access fault (from ipl 1) ---
> tcp_sack_option() at netbsd:tcp_sack_option+0x13c
> tcp_dooptions() at netbsd:tcp_dooptions+0x278
> tcp_input() at netbsd:tcp_input+0xa20
> ip_input() at netbsd:ip_input+0xb4c
> ipintr() at netbsd:ipintr+0xa0
> netintr() at netbsd:netintr+0x158
> softintr_dispatch() at netbsd:softintr_dispatch+0x160
> exception_return() at netbsd:exception_return+0x7c
> --- root of call graph ---
>
> [-- eric@localhost attached -- Mon Jul 24 17:52:22 2006]
> db> bt
> cpu_Debugger() at netbsd:cpu_Debugger+0x4
> panic() at netbsd:panic+0x1f8
> trap() at netbsd:trap+0x120
> XentUna() at netbsd:XentUna+0x20
> --- unaligned access fault (from ipl 1) ---
> tcp_sack_option() at netbsd:tcp_sack_option+0x13c
> tcp_dooptions() at netbsd:tcp_dooptions+0x278
> tcp_input() at netbsd:tcp_input+0xa20
> ip_input() at netbsd:ip_input+0xb4c
> ipintr() at netbsd:ipintr+0xa0
> netintr() at netbsd:netintr+0x158
> softintr_dispatch() at netbsd:softintr_dispatch+0x160
> exception_return() at netbsd:exception_return+0x7c
> --- root of call graph ---
>
> The other system, a PC64, which got NetBSD 4.0_BETA
> loaded on it a couple of weeks ago (after a couple years of
> running 1.6, uptime of neary 2 years when shutdown) generated
> the following panic after an (idle) uptime of a couple of
> weeks: (dmesg in second attachment)
>
> [-- eric@localhost attached -- Mon Oct 2 19:51:02 2006]
> db> bt
> cpu_Debugger() at netbsd:cpu_Debugger+0x4
> panic() at netbsd:panic+0x1e8
> machine_check() at netbsd:machine_check+0x304
> interrupt() at netbsd:interrupt+0x2b8
> XentInt() at netbsd:XentInt+0x1c
> --- interrupt (from ipl 0) ---
> ffs_sync() at netbsd:ffs_sync+0x294
> sync_fsync() at netbsd:sync_fsync+0xf0
> VOP_FSYNC() at netbsd:VOP_FSYNC+0x48
> sched_sync() at netbsd:sched_sync+0x26c
> exception_return() at netbsd:exception_return
> --- root of call graph ---
>
> My gut feeling is that they're related, but I haven't a
> bit of proof about it.
>
> Any suggestions on what additional information to gather
> the next time this happens?
>
> Thanks,
> Eric
>
> --
> Eric Schnoebelen eric@cirr.com http://www.cirr.com
> The most feared words in any (large) organization:
> ``We're from corporate - we're here to help you...''
> Loaded initial symtab at 0xfffffc0000b9ccc0, strtab at
> 0xfffffc0000c0ec50, # entries 19369
> consinit: not using prom console
> Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
> 2005
> The NetBSD Foundation, Inc. All rights reserved.
> Copyright (c) 1982, 1986, 1989, 1991, 1993
> The Regents of the University of California. All rights reserved.
>
> NetBSD 3.0_STABLE (Milo: based on ALPHA-$Revision: 1.202.2.3 $) #2:
> Wed Jul 26 08:30:51 CDT 2006
> root@milo.cirr.com:/usr/src/sys/arch/alpha/compile/MILO
> AlphaServer DS10L 617 MHz, s/n AY10605785
> 8192 byte page size, 1 processor.
> total memory = 1024 MB
> (2912 KB reserved for PROM, 1021 MB used by NetBSD)
> avail memory = 993 MB
> mainbus0 (root)
> cpu0 at mainbus0: ID 0 (primary), 21264A-9
> cpu0: VAX FP support, IEEE FP support, Primary Eligible
> cpu0: Architecture extensions: 307<PAT,MVI,CIX,FIX,BWX>
> tsc0 at mainbus0: 21272 Core Logic Chipset, Cchip rev 0
> tsc0: 2 Dchips, 1 memory bus of 16 bytes
> tsc0: arrays present: 1024MB (split), 0MB, 0MB, 0MB, Dchip 0 rev 1
> tsp0 at tsc0
> pci0 at tsp0 bus 0
> pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
> sio0 at pci0 dev 7 function 0: Acer Labs M1543 PCI-ISA Bridge (rev.
> 0xc3)
> tlp0 at pci0 dev 9 function 0: DECchip 21143 Ethernet, pass 4.1
> tlp0: interrupting at dec 6600 irq 29
> tlp0: Ethernet address 00:10:64:30:1c:a9
> tlp0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
> tlp1 at pci0 dev 11 function 0: DECchip 21143 Ethernet, pass 4.1
> tlp1: interrupting at dec 6600 irq 30
> tlp1: Ethernet address 00:10:64:30:1c:ab
> tlp1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
> aceride0 at pci0 dev 13 function 0
> aceride0: Acer Labs M5229 UDMA IDE Controller (rev. 0xc1)
> aceride0: bus-master DMA support present
> aceride0: primary channel wired to compatibility mode
> aceride0: primary channel interrupting at isa irq 14
> atabus0 at aceride0 channel 0
> aceride0: secondary channel wired to compatibility mode
> aceride0: secondary channel interrupting at isa irq 15
> atabus1 at aceride0 channel 1
> isa0 at sio0
> lpt0 at isa0 port 0x3bc-0x3bf irq 7
> com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
> com0: console
> com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo
> pckbc0 at isa0 port 0x60-0x64
> pckbdprobe: reset error 5
> pmsprobe: reset error 5
> pcppi0 at isa0 port 0x61
> midi0 at pcppi0: PC speaker
> spkr0 at pcppi0
> isabeep0 at pcppi0
> fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
> mcclock0 at isa0 port 0x70-0x71: mc146818 or compatible
> raidattach: Asked for 8 units
> Kernelized RAIDframe activated
> IPsec: Initialized Security Association Processing.
> wd0 at atabus0 drive 0: <Maxtor 53073H4>
> wd0: drive supports 16-sector PIO transfers, LBA addressing
> wd0: 28629 MB, 58168 cyl, 16 head, 63 sec, 512 bytes/sect x 58633344
> sectors
> wd0: 32-bit data port
> wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/
> 100)
> wd0(aceride0:0:0): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33)
> (using DMA)
> wd1 at atabus1 drive 0: <Maxtor 6B250R0>
> wd1: drive supports 16-sector PIO transfers, LBA48 addressing
> wd1: 233 GB, 486344 cyl, 16 head, 63 sec, 512 bytes/sect x 490234752
> sectors
> wd1: 32-bit data port
> wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/
> 133)
> wd1(aceride0:1:0): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33)
> (using DMA)
> Searching for RAID components...
> stray isa irq 14
> stray isa irq 15
> root on wd0a dumps on wd0b
> mountroot: trying nfs...
> mountroot: trying msdos...
> mountroot: trying cd9660...
> wd0: transfer error, downgrading to Ultra-DMA mode 1
> wd0(aceride0:0:0): using PIO mode 4, Ultra-DMA mode 1 (using DMA)
> wd0a: DMA error reading fsbn 64 of 64-67 (wd0 bn 64; cn 0 tn 1 sn
> 1), retrying
> stray isa irq 14
> wd0: soft error (corrected)
> mountroot: trying lfs...
> mountroot: trying ffs...
> root file system type: ffs
> readclock: 6/9/27/0/17/44=>1159316264 (1159311193)
> init: copying out path `/sbin/init' 11
> stray isa irq 15
> wd1: transfer error, downgrading to Ultra-DMA mode 1
> wd1(aceride0:1:0): using PIO mode 4, Ultra-DMA mode 1 (using DMA)
> wd1a: DMA error reading fsbn 16 of 16-31 (wd1 bn 16; cn 0 tn 0 sn
> 16), retrying
> stray isa irq 15
> stray isa irq 15
> wd1: soft error (corrected)
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> aceride0:1:0: lost interrupt
> type: ata tc_bcount: 8192 tc_skip: 0
> aceride0:1:0: bus-master DMA error: missing interrupt, status=0x21
> wd1: transfer error, downgrading to PIO mode 4
> wd1(aceride0:1:0): using PIO mode 4
> wd1f: DMA error reading fsbn 16 of 16-31 (wd1 bn 280132624; cn
> 312648 tn 0 sn 16), retrying
> stray isa irq 15
> stray isa irq 15
> wd1: soft error (corrected)
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> stray isa irq 15
> setclock: 6/9/27/0/59/47
> stray isa irq 15
> stray isa irq 15
> interface, rev. 0
> lxtphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
> isp1 at pci0 dev 7 function 0: QLogic 1020 Fast Wide SCSI HBA
> isp1: interrupting at eb64+ irq 1
> scsibus1 at isp1: 16 targets, 8 luns per target
> sio0 at pci0 dev 8 function 0: Intel 82378ZB System I/O (rev. 0x03)
> isp2 at pci0 dev 9 function 0: QLogic 1020 Fast Wide SCSI HBA
> isp2: interrupting at eb64+ irq 3
> scsibus2 at isp2: 16 targets, 8 luns per target
> isa0 at sio0
> lpt0 at isa0 port 0x3bc-0x3bf irq 7
> com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
> com0: console
> com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo
> pckbc0 at isa0 port 0x60-0x64
> attimer0 at isa0 port 0x40-0x43: AT Timer
> pcppi0 at isa0 port 0x61
> midi0 at pcppi0: PC speaker (CPU-intensive output)
> spkr0 at pcppi0
> isabeep0 at pcppi0
> fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
> mcclock0 at isa0 port 0x70-0x71: mc146818 or compatible
> pcppi0: attached to attimer0
> Kernelized RAIDframe activated
> scsibus0: waiting 2 seconds for devices to settle...
> scsibus1: waiting 2 seconds for devices to settle...
> scsibus2: waiting 2 seconds for devices to settle...
> sd0 at scsibus0 target 0 lun 0: <COMPAQPC, WDE4550W, 1.01> disk fixed
> sd0: 4094 MB, 6932 cyl, 6 head, 201 sec, 512 bytes/sect x 8386000
> sectors
> sd0: sync (100.00ns offset 12), 16-bit (20.000MB/s) transfers,
> tagged queueing
> sd1 at scsibus0 target 1 lun 0: <FUJITSU, MAF3364L SUN36G, 1213>
> disk fixed
> sd1: 34732 MB, 24622 cyl, 27 head, 107 sec, 512 bytes/sect x
> 71132959 sectors
> sd1: sync (100.00ns offset 12), 16-bit (20.000MB/s) transfers,
> tagged queueing
> cd0 at scsibus0 target 4 lun 0: <TOSHIBA, CD-ROM XM-4101TA, 1084>
> cdrom removable
> cd0: async, 8-bit transfers
> st0 at scsibus0 target 5 lun 0: <ARCHIVE, Python 28388-XXX, 5.40>
> tape removable
> st0: drive empty
> st0: async, 8-bit transfers
> st1 at scsibus1 target 1 lun 0: <EXABYTE, EXB-89008E030203, V41j>
> tape removable
> st1: density code 39, 1024-byte blocks, write-enabled
> st1: sync (100.00ns offset 8), 16-bit (20.000MB/s) transfers
> st2 at scsibus1 target 2 lun 0: <EXABYTE, EXB-8900, V41j> tape
> removable
> st2: drive empty
> st2: sync (100.00ns offset 8), 16-bit (20.000MB/s) transfers
> st3 at scsibus1 target 3 lun 0: <EXABYTE, EXB-89008E00012F, V41b>
> tape removable
> st3: drive empty
> st3: sync (100.00ns offset 8), 16-bit (20.000MB/s) transfers
> st4 at scsibus1 target 4 lun 0: <EXABYTE, EXB-89008E030203, V39e>
> tape removable
> st4: drive empty
> st4: sync (100.00ns offset 8), 16-bit (20.000MB/s) transfers
> scsibus2 target 0 lun 0: <EXABYTE, EXB-480, 5.00> changer removable
> not configured
> root on sd0a dumps on sd0b
> root file system type: ffs
>
> unexpected machine check:
>
> mces = 0x1
> vector = 0x670
> param = 0xfffffc0000006000
> pc = 0xfffffc0000589174
> ra = 0xfffffc0000589128
> code = 0x100000000
> curlwp = 0xfffffc000fcfb800
> pid = 7.1, comm = ioflush
>
> panic: machine check
> syncing disks... tlp0: receive ring overrun
>
> unexpected machine check:
>
> mces = 0x1
> vector = 0x670
> param = 0xfffffc0000006000
> pc = 0xfffffc0000589174
> ra = 0xfffffc0000589128
> code = 0x100000000
> curlwp = 0xfffffc000fcfb800
> pid = 7.1, comm = ioflush
>
> panic: machine check
>
> dumping to dev 8,1 offset 523725
> dump 256 255 254 253 252 251 250 249 248 247 246 245 244 243 242 241
> 240 239 238 237 236 235 234 233 232 231 230 229 228 227 226 225 224
> 223 222 221 220 219 218 217 216 215 214 213 212 211 210 209 208 207
> 206 205 204 203 202 201 200 199 198 197 196 195 194 193 192 191 190
> 189 188 187 186 185 184 183 182 181 180 179 178 177 176 175 174 173
> 172 171 170 169 168 167 166 165 164 163 162 161 160 159 158 157 156
> 155 154 153 152 151 150 149 148 147 146 145 144 143 142 141 140 139
> 138 137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122
> 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105
> 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84
> 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
> 60 59 58 isp0: DMA error for command on 0.0.0
> isp0: BOTCHED cmd for 0.0.0 cmd 0x2a datalen 8192
> i/o error
>
>
> sd0(isp0:0:0:0): polling command not done
> panic: scsipi_execute_xs
>
> dumping to dev 8,1 offset 523725
> dump device not ready
>
>
> rebooting...
>
> Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
> 2005, 2006
> The NetBSD Foundation, Inc. All rights reserved.
> Copyright (c) 1982, 1986, 1989, 1991, 1993
> The Regents of the University of California. All rights reserved.
>
> NetBSD 4.0_BETA (GENERIC) #1: Tue Sep 12 02:09:16 CDT 2006
> eric@egsner.cirr.com:/work/eric/NetBSD-4/obj/alpha/sys/arch/alpha/
> compile/GENERIC
> Digital AlphaPC 64 274 MHz, s/n
> 8192 byte page size, 1 processor.
> total memory = 256 MB
> (2040 KB reserved for PROM, 254 MB used by NetBSD)
> avail memory = 241 MB
> mainbus0 (root)
> cpu0 at mainbus0: ID 0 (primary), 21064A-2
> apecs0 at mainbus0: DECchip 21072 Core Logic chipset
> apecs0: DC21071-CA pass 2, 128-bit memory bus
> apecs0: DC21071-DA pass 2
> pci0 at apecs0 bus 0
> pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
> ppb0 at pci0 dev 5 function 0: Digital Equipment DC21050 PCI-PCI
> Bridge (rev. 0x02)
> pci1 at ppb0 bus 1
> pci1: memory space enabled, rd/line, wr/inv ok
> isp0 at pci1 dev 0 function 0: QLogic 1020 Fast Wide SCSI HBA
> isp0: interrupting at eb64+ irq 2
> scsibus0 at isp0: 16 targets, 8 luns per target
> tlp0 at pci0 dev 6 function 0: DECchip 21140A Ethernet, pass 2.2
> tlp0: interrupting at eb64+ irq 0
> tlp0: Ethernet address 00:40:05:a3:d7:84
> lxtphy0 at tlp0 phy 0: LXT970 10/100 media interface, rev. 0
> lxtphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
> isp1 at pci0 dev 7 function 0: QLogic 1020 Fast Wide SCSI HBA
> isp1: interrupting at eb64+ irq 1
> scsibus1 at isp1: 16 targets, 8 luns per target
> sio0 at pci0 dev 8 function 0: Intel 82378ZB System I/O (rev. 0x03)
> isp2 at pci0 dev 9 function 0: QLogic 1020 Fast Wide SCSI HBA
> isp2: interrupting at eb64+ irq 3
> scsibus2 at isp2: 16 targets, 8 luns per target
> isa0 at sio0
> lpt0 at isa0 port 0x3bc-0x3bf irq 7
> com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
> com0: console
> com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo
> pckbc0 at isa0 port 0x60-0x64
> attimer0 at isa0 port 0x40-0x43: AT Timer
> pcppi0 at isa0 port 0x61
> midi0 at pcppi0: PC speaker (CPU-intensive output)
> spkr0 at pcppi0
> isabeep0 at pcppi0
> fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
> mcclock0 at isa0 port 0x70-0x71: mc146818 or compatible
> pcppi0: attached to attimer0
> Kernelized RAIDframe activated
> scsibus0: waiting 2 seconds for devices to settle...
> scsibus1: waiting 2 seconds for devices to settle...
> scsibus2: waiting 2 seconds for devices to settle...
> sd0 at scsibus0 target 0 lun 0: <COMPAQPC, WDE4550W, 1.01> disk fixed
> sd0: 4094 MB, 6932 cyl, 6 head, 201 sec, 512 bytes/sect x 8386000
> sectors
> sd0: sync (100.00ns offset 12), 16-bit (20.000MB/s) transfers,
> tagged queueing
> sd1 at scsibus0 target 1 lun 0: <FUJITSU, MAF3364L SUN36G, 1213>
> disk fixed
> sd1: 34732 MB, 24622 cyl, 27 head, 107 sec, 512 bytes/sect x
> 71132959 sectors
> sd1: sync (100.00ns offset 12), 16-bit (20.000MB/s) transfers,
> tagged queueing
> cd0 at scsibus0 target 4 lun 0: <TOSHIBA, CD-ROM XM-4101TA, 1084>
> cdrom removable
> cd0: async, 8-bit transfers
> st0 at scsibus0 target 5 lun 0: <ARCHIVE, Python 28388-XXX, 5.40>
> tape removable
> st0: drive empty
> st0: async, 8-bit transfers
> st1 at scsibus1 target 1 lun 0: <EXABYTE, EXB-89008E030203, V41j>
> tape removable
> st1: density code 39, 1024-byte blocks, write-enabled
> st1: sync (100.00ns offset 8), 16-bit (20.000MB/s) transfers
> st2 at scsibus1 target 2 lun 0: <EXABYTE, EXB-8900, V41j> tape
> removable
> st2: drive empty
> st2: sync (100.00ns offset 8), 16-bit (20.000MB/s) transfers
> st3 at scsibus1 target 3 lun 0: <EXABYTE, EXB-89008E00012F, V41b>
> tape removable
> st3: drive empty
> st3: sync (100.00ns offset 8), 16-bit (20.000MB/s) transfers
> st4 at scsibus1 target 4 lun 0: <EXABYTE, EXB-89008E030203, V39e>
> tape removable
> st4: drive empty
> st4: sync (100.00ns offset 8), 16-bit (20.000MB/s) transfers
> scsibus2 target 0 lun 0: <EXABYTE, EXB-480, 5.00> changer removable
> not configured
> root on sd0a dumps on sd0b
> root file system type: ffs
-- thorpej