Hello !
Something is weird with standard dump/restore procedure which I've
always used to relocate my filesystems. I'm using 4.0-19991208-CURRENT
on two machines, one is my home machine with SiS 5591 ATA controller and
the other one has Intel PIIX. Home machine has disk pair Seagate 6.4GB
and IBM 37.5GB, the other one Quantum Fireball 1GB and Fujitsu 3.2GB.
First pair is in standard WDMA2 mode, the other one in PIO as per ata
driver boot messages. Both setups have disks on separate channels, disks
are masters.
Problem:
I'm trying to use dump/restore pair piped together to relocate / and
/usr filesystems to the secondary master disk. In the first case from
Seagate to IBM and second case from Quantum to Fujitsu. Target disks
have innocent filesystems just created. On the home machine with SiS
controller the overall dump/restore process runs smoothly until phase IV
when it will do regular file dumping. Now the process stops regularly
for about 10 seconds, then runs for 4 seconds or so. The process just
runs, stops, runs, stops and so forth. Intervals aren't always same, but
the stopped period is always longer. I dropped to in-kernel debugger and
used ps to view process states. The dump wmesg column showed pipdwt and
sbwait, for restore it's nbufkv. There's five lines for dump overall,
the not mentioned were in wait or pause state.
After viewing ps in debugger I continued the usual run and launced top.
Everything stops while the restore process enters into nbuf?? state,
top can't refresh screen etc, but everything continues after stopped
period so I can see the restore process state changing.
For the record, at last I used pax to relocate the data on the /usr
filesystem and pax showed exactly same behavior. Difference was in
reversed stop/run sequence, runs lasted lot longer than stopped states,
pax even run for ten minutes, then stopped for about 13 seconds.
The wd driver has same behavior, kernel with wd driver has same
configuration as ata one. This claim is only true for SiS 5591 case as
I've not tried yet with other machine.
For other machine everything is same except machine stops completely.
I've tried to disable softupdates on both source and target filesystems
but no difference. All procedures were done in single user mode.
It's very annoying, I have only fair experiences with dump/restore back
to the 2.2.2 days until now.
machine i386
ident Vokk
maxusers 32
makeoptions CONF_CFLAGS=-fno-builtin #Don't allow use of memcmp, etc.
makeoptions DEBUG=-g #Build kernel with gdb(1) debug symbols
options PQ_NORMALCACHE # color for 256k/16k cache
cpu I586_CPU # aka Pentium Pro(tm)
options COMPAT_43
options SYSVSHM
options SYSVSEM
options SYSVMSG
options MD5
options DDB
options DDB_UNATTENDED
options INET #Internet communications protocols
pseudo-device ether #Generic Ethernet
pseudo-device loop #Network loopback device
pseudo-device bpf #Berkeley packet filter
options ICMP_BANDLIM
options FFS #Fast filesystem
options NFS #Network File System
options CD9660 #ISO 9660 filesystem
options PROCFS #Process filesystem
options FFS_ROOT #FFS usable as root device
options SOFTUPDATES
options P1003_1B
options _KPOSIX_PRIORITY_SCHEDULING
options _KPOSIX_VERSION=199309L
pseudo-device pty #Pseudo ttys
pseudo-device vn #Vnode driver (turns a file into a device)
pseudo-device snp 3 #Snoop device - to look at pty/vty/etc..
options MSGBUF_SIZE=40960
controller isa0
controller atkbdc0 at isa? port IO_KBD
device atkbd0 at atkbdc? irq 1
device vga0 at isa? port ? conflicts
pseudo-device splash
device sc0 at isa?
options MAXCONS=8 # number of virtual consoles
options SC_HISTORY_SIZE=800 # number of history buffer lines
device npx0 at nexus? port IO_NPX flags 0x0 irq 13
controller ata0
device atadisk0 # ATA disk drives
device atapicd0 # ATAPI CDROM drives
options ATA_ENABLE_ATAPI_DMA
controller fdc0 at isa? port IO_FD1 irq 6 drq 2
device fd0 at fdc0 drive 0
device sio0 at isa? port IO_COM1 flags 0x10 irq 4
device sio1 at isa? port IO_COM2 irq 3
controller miibus0
controller pci0
device vr0
controller ppbus0
device lpt0 at ppbus?
device plip0 at ppbus?
device ppi0 at ppbus?
device ppc0 at isa? port? irq 7
options CLK_CALIBRATION_LOOP
options CLK_USE_I8254_CALIBRATION
options CLK_USE_TSC_CALIBRATION
--
Vallo Kallaste
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