Hi!
We experience a problem with a HP Ultrium LTO drive connected
to a Compaq ProLiant ML380 server: in the last 6 months we had
two deadlocks of the machine which seem to be related to the
sym53c8xx driver.
What happens seems to be as follows:
*) From monday to friday, once a day an amanda backup process
starts and dumps about 70GB of data to the tape.
*) this works quite fine, but twice in the last 6 months we
got the following tape error at the start of the backup:
[...]
Dec 10 15:00:00 server kernel: sym53c1510D-0-<3,*>: FAST-20 WIDE SCSI
40.0 MB/s (50 ns, offset 15)
Dec 10 15:00:01 server kernel: st0: Error with sense data: Info
fld=0x8000, Current st09:00: sense key Hardware Error
Dec 10 15:00:01 server kernel: Additional sense indicates Internal
target failure
[...]
After that, the amanda process hangs in state "D" and
cannot be killed anymore. The machine itself is still
working.
This _seems_ to be the indication of an error of the
HP Ultrium itself, though the drive works quite fine
otherwise...
*) In order to unlock the hanging amanda process I tried to
remove the SCSI drive from the driver:
echo "scsi remove-single-device" > /proc/scsi/scsi
This did work well: the hanging amanda process terminated
fine after that.
*) Next I tried to re-scan the SCSI bus to make the Ultrium
drive available again for a new backup:
echo "scsi add-single-device 0 0 3 0" > /proc/scsi/scsi
Result: the machine completely deadlocked. No log-message,
no ping (the server currently runs without monitor and
keyboard connected...)
We had to power-switch the machine to get it back... :-(
I now have the following problems/questions:
a) Does anyone have any experience with such an HP Ultrium drive?
(good/bad?)
b) Does the st0 error message indicate it should be replaced?
c) Is there a bug in the sym53c8xx driver which makes the
amanda process hang uninterruptable when this error occurs?
It is not nice to be forced to reboot the machine just because
the SCSI tape drive reported some error... :-((
After all, this is not a windows server, and there are 40
workstations which get fileservice from this server!
d) Is there a bug in the driver which deadlocks the server
as soon as someone does a remove/add on the SCSI bus?
We can live without this feature, but I don't think a
documented function should deadlock the kernel...
The Ultrium hardware error is not reproducable at will. It
just happens every now and then.
Next thing I will try is to use a different SCSI controller
(Adaptec 29160 or the like) to see if the hanging process
occurs with a different SCSI driver, too.
Following is some information about the server:
Hardware: Compaq ProLiant ML370, Intel PIII/933, 512MB RAM,
Compaq Smart Array 5302/32 RAID Controller with about 80GB
of disk-capacity, 3Com 3c985 1000BaseSX NIC
Software: Linux-2.2.18 with newer acenic driver (for the 3Com NIC)
Some information from the running system:
root@server {533} # free
total used free shared buffers
cached
Mem: 517644 439092 78552 47404 166716
178744
-/+ buffers/cache: 93632 424012
Swap: 1052592 18400 1034192
root@server {534} # lspci -v
00:00.0 Host bridge: Relience Computer CNB20HE (rev 05)
Flags: bus master, medium devsel, latency 64
00:00.1 Host bridge: Relience Computer CNB20HE (rev 05)
Flags: bus master, medium devsel, latency 64
00:01.0 SCSI storage controller: Symbios Logic Inc. (formerly NCR):
Unknown device 000a (rev 02)
Subsystem: Compaq Computer Corporation: Unknown device b143
Flags: bus master, medium devsel, latency 255, IRQ 10
I/O ports at 2000
Memory at c6cffc00 (32-bit, non-prefetchable)
Memory at c6cfe000 (32-bit, non-prefetchable)
Capabilities: [40] Power Management version 2
00:01.1 SCSI storage controller: Symbios Logic Inc. (formerly NCR):
Unknown device 000a (rev 02)
Subsystem: Compaq Computer Corporation: Unknown device b143
Flags: bus master, medium devsel, latency 255, IRQ 11
I/O ports at 2400
Memory at c6cfdc00 (32-bit, non-prefetchable)
Memory at c6cfc000 (32-bit, non-prefetchable)
Capabilities: [40] Power Management version 2
00:02.0 Ethernet controller: Intel Corporation 82557 [Ethernet Pro
100] (rev 08)
Subsystem: Compaq Computer Corporation: Unknown device b134
Flags: bus master, medium devsel, latency 64, IRQ 15
Memory at c6cfb000 (32-bit, non-prefetchable)
I/O ports at 2800
Memory at c6b00000 (32-bit, non-prefetchable)
Capabilities: [dc] Power Management version 2
00:03.0 VGA compatible controller: ATI Technologies Inc 3D Rage IIC
215IIC [Mach64 GT IIC] (rev 7a) (prog-if 00 [VGA])
Subsystem: ATI Technologies Inc: Unknown device 4756
Flags: bus master, stepping, medium devsel, latency 64
Memory at c5000000 (32-bit, prefetchable)
I/O ports at 2c00
Memory at c6aff000 (32-bit, non-prefetchable)
Capabilities: [5c] Power Management version 1
00:04.0 System peripheral: Compaq Computer Corporation: Unknown device
a0f0
Subsystem: Compaq Computer Corporation: Unknown device b0f3
Flags: medium devsel
I/O ports at 1800
Memory at c6afef00 (32-bit, non-prefetchable)
00:0f.0 ISA bridge: Relience Computer: Unknown device 0200 (rev 51)
Subsystem: Relience Computer: Unknown device 0200
Flags: bus master, medium devsel, latency 0
00:0f.1 IDE interface: Relience Computer: Unknown device 0211 (prog-if
8a [Master SecP PriP])
Flags: bus master, medium devsel, latency 64
I/O ports at 3000
03:03.0 RAID bus controller: Compaq Computer Corporation: Unknown
device b060 (rev 02)
Subsystem: Compaq Computer Corporation: Unknown device 4070
Flags: bus master, 66Mhz, medium devsel, latency 64, IRQ 5
Memory at c6fc0000 (32-bit, non-prefetchable)
Memory at c6e00000 (32-bit, non-prefetchable)
I/O ports at 4000
Capabilities: [f0] Power Management version 2
Capabilities: [f8] Vital Product Data
03:06.0 Ethernet controller: 3Com Corporation 3c985 1000BaseSX (rev
01)
Subsystem: Unknown device 9850:0001
Flags: bus master, 66Mhz, medium devsel, latency 64, IRQ 15
Memory at c6dfc000 (32-bit, non-prefetchable)
root@server {535} # cat /proc/cciss/cciss0
cciss0: Compaq Smart Array 5300 Controller
Board ID: 40700e11
Firmware Version: 1.62
Memory Address: e0812000
IRQ: 0x5
Logical drives: 2
Current Q depth: 0
Current # commands on controller 0
Max Q depth since init: 1
Max # commands on controller since init: 128
Max SG entries since init: 22
cciss/c0d0: blksz=512 nr_blocks=17764320
cciss/c0d1: blksz=512 nr_blocks=142261440
nr_allocs = 11831533
nr_frees = 11831533
root@server {536} # cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 03 Lun: 00
Vendor: HP Model: Ultrium 1-SCSI Rev: N11D
Type: Sequential-Access ANSI SCSI revision: 03
root@server {537} # cat /proc/scsi/sym53c8xx/0
General information:
Chip sym53c1510D, device id 0xa, revision id 0x2
On PCI bus 0, device 1, function 0, IRQ 10
Synchronous period factor 10, max commands per lun 32
root@server {538} # cat /proc/scsi/sym53c8xx/1
General information:
Chip sym53c1510D, device id 0xa, revision id 0x2
On PCI bus 0, device 1, function 1, IRQ 11
Synchronous period factor 10, max commands per lun 32
root@server {539} # cat /proc/interrupts
CPU0
0: 76904808 XT-PIC timer
1: 2 XT-PIC keyboard
2: 0 XT-PIC cascade
3: 5231002 XT-PIC serial
5: 11578119 XT-PIC cciss0
8: 2 XT-PIC rtc
10: 13412657 XT-PIC sym53c8xx
11: 450 XT-PIC sym53c8xx
13: 1 XT-PIC fpu
15: 36100885 XT-PIC eth0
NMI: 0
ERR: 0
root@server {540} # uname -a
Linux server 2.2.18 #1 SMP Sun May 27 23:14:43 CEST 2001 i686 unknown
root@server {541} # lsmod
Module Size Used by
sym53c8xx 56592 0
af_packet 6528 1 (autoclean)
nfsd 184416 16 (autoclean)
nfs 75872 1 (autoclean)
lockd 47344 1 (autoclean) [nfsd nfs]
sunrpc 63376 1 (autoclean) [nfsd nfs lockd]
acenic 125744 1 (autoclean)
softdog 1584 1 (autoclean)
st 25424 0
scsi_mod 55504 2 [sym53c8xx st]
cciss 17552 9
ext2 42032 7
These are the sym53c8xx driver's boot-messages:
[...]
sym53c8xx: at PCI bus 0, device 1, function 0
sym53c8xx: 53c1510D detected
sym53c8xx: at PCI bus 0, device 1, function 1
sym53c8xx: 53c1510D detected
sym53c1510D-0: rev 0x2 on pci bus 0 device 1 function 0 irq 10
sym53c1510D-0: ID 7, Fast-40, Parity Checking
sym53c1510D-1: rev 0x2 on pci bus 0 device 1 function 1 irq 11
sym53c1510D-1: ID 7, Fast-40, Parity Checking
scsi0 : sym53c8xx-1.7.1-20000726
scsi1 : sym53c8xx-1.7.1-20000726
scsi : 2 hosts.
Vendor: HP Model: Ultrium 1-SCSI Rev: N11D
Type: Sequential-Access ANSI SCSI revision: 03
Detected scsi tape st0 at scsi0, channel 0, id 3, lun 0
[...]
Any help is appreciated!
Many thanks in advance!
- andreas
-- Andreas Haumer | mailto:andreas@xss.co.at *x Software + Systeme | http://www.xss.co.at/ Karmarschgasse 51/2/20 | Tel: +43-1-6060114-0 A-1100 Vienna, Austria | Fax: +43-1-6060114-71 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sun Dec 23 2001 - 21:00:18 EST