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Hello everyone. I hope someone can help me out or at least give me a hint to how to solve this issue:
I have an arch box running the latest x86_64 arch release.
I'm using the programm "dump " http://dump.sourceforge.net/to backup to my tape device (which is an HP storageworks 920)
My scsi controller is an Intel® RAID Controller SRCU42E http://www.intel.com/design/servers/RAID/srcu42e/ controller plugged into the PCIe slot of my machine. As far as I can see it's one of the few cards for scsi devices that support Ultra 320 speeds for scsi.
The problem is that with each blocksize (from 256 up to 1024) speeds are incredibly slow.
My motherboard is: ASRock 939Dual-SATA2
My question is how to debug this whole situation,
some info on my system:
# lsmod
Module Size Used by
st 40484 2
mptspi 16784 0
mptscsih 21632 1 mptspi
mptbase 55136 2 mptspi,mptscsih
sg 31784 0
udf 83496 1
ipv6 302024 12
nvidia 8107320 24
ppdev 8712 0
lp 11720 0
snd_seq_oss 32896 0
snd_seq_midi_event 7808 1 snd_seq_oss
snd_seq 55680 4 snd_seq_oss,snd_seq_midi_event
snd_seq_device 7956 2 snd_seq_oss,snd_seq
usb_storage 91072 3
snd_pcm_oss 42144 0
snd_mixer_oss 16896 1 snd_pcm_oss
analog 10976 0
pcspkr 3456 0
ppp_generic 27680 0
ns558 5120 0
gameport 13712 3 analog,ns558
slhc 6528 1 ppp_generic
rtc_cmos 8504 0
rtc_core 18060 1 rtc_cmos
rtc_lib 3456 1 rtc_core
uli526x 17044 0
parport_pc 40680 1
ehci_hcd 34956 0
psmouse 41884 0
serio_raw 6788 0
snd_intel8x0 34600 1
snd_ac97_codec 116824 1 snd_intel8x0
ac97_bus 3072 1 snd_ac97_codec
snd_pcm 82440 3 snd_pcm_oss,snd_intel8x0,snd_ac97_codec
snd_timer 22664 2 snd_seq,snd_pcm
parport 37132 3 ppdev,lp,parport_pc
k8temp 5760 0
i2c_ali1535 7556 0
i2c_ali1563 7812 0
i2c_ali15x3 8196 0
i2c_core 23552 4 nvidia,i2c_ali1535,i2c_ali1563,i2c_ali15x3
snd 57448 11 snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_intel8x0,snd_ac97_codec,snd_pcm,snd_timer
soundcore 7968 1 snd
snd_page_alloc 8720 2 snd_intel8x0,snd_pcm
ohci_hcd 21636 0
shpchp 32924 0
pci_hotplug 31748 1 shpchp
tsdev 8064 0
evdev 9984 3
thermal 13200 0
processor 28952 1 thermal
fan 4872 0
button 7584 0
battery 9864 0
ac 5128 0
capability 4616 0
commoncap 6528 1 capability
usbcore 132144 4 usb_storage,ehci_hcd,ohci_hcd
ext3 131856 9
jbd 64752 1 ext3
mbcache 8584 1 ext3
ide_disk 15744 2
ide_cd 39840 1
cdrom 38312 1 ide_cd
osst 56232 0
sd_mod 25088 15
alim15x3 11288 0 [permanent]
megaraid_mbox 32272 1
megaraid_mm 10680 1 megaraid_mbox
ahci 22660 1
generic 6276 0 [permanent]
ide_core 140816 5 usb_storage,ide_disk,ide_cd,alim15x3,generic
sata_promise 12804 2
sata_uli 6404 3
libata 119440 3 ahci,sata_promise,sata_uli lsscsi
[0:0:0:0] disk ATA SAMSUNG SP2504C VT10 /dev/sda
[2:0:3:0] tape HP Ultrium 3-SCSI D21D /dev/st0
[3:0:0:0] disk ATA SAMSUNG HD501LJ CR10 /dev/sdbThe scsi RAID card is attached to the Tape device only, no harddiscs whatsoever are attached.
dump -b 1024 -f /dev/st0 /media/media5/AF
DUMP: Date of this level dump: Sat Sep 1 18:30:37 2007
DUMP: Dumping /dev/sdb1 (/media/media5_(dir /AF)) to /dev/st0
DUMP: Label: media5
DUMP: Writing 1024 Kilobyte records
DUMP: mapping (Pass I) [regular files]
DUMP: mapping (Pass II) [directories]
DUMP: estimated 398145918 blocks.
DUMP: Volume 1 started with block 1 at: Sat Sep 1 18:30:38 2007
DUMP: 0.00% done, finished in 0:00
DUMP: dumping (Pass III) [directories]
DUMP: dumping (Pass IV) [regular files]
DUMP: 0.14% done at 1877 kB/s, finished in 58:49As you can see it only writes at 1877 kB/s my tape device is also pausing a lot, so I assume it's something with the scsi raid device not working as fast as it should.
The card uses an LSI chip: http://www.lsi.com/storage_home/product … index.html which uses the driver:
Fusion MPT base driver 3.04.04
Copyright (c) 1999-2007 LSI Logic Corporation
Fusion MPT SPI Host driver 3.04.04
Which I loaded manually. I also loaded the sg and the st module manually. It doesn't matter in what order I load these modules, the speed remains the same.
Anyone with any idea how to fix this? How can I make sure the controller uses it's full 320 capacity?
Any help would be great!
Last edited by dafart (2007-09-01 14:52:40)
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Usually it's advised to use a normal SCSI hostcontroler instead of a RAID controler. does your tapestreamer have the correct sync speed for bus comunication? Also, is the termination managed correctly on your cable setup?
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Hi there, thanks for the reply.
The Tape streamer has an interface: Ultra 320 SCSI (LVD) or 3Gb/sec SAS (i have tge scsi version) so it should work fine with the controller. Also when I use my adaptec uw160 pci card it gets speeds as fast as 35700 kB/s so I'm sure there's something wrong with the controller itself.
The controller I have is one of the few that reach scsi ultra 320 speeds. I haven't found a non-RAID scsi controller at all for this interface. It's designed for pci-e interface to handle the speed.
Hope to be a bit more clear now & thanks.
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