Hi,

I've just setup a IBM LTO6 drive on the latest Cent OS v. 7.5.

I have problems reading/writing backups.

I use: tar cvf /dev/st0 -b 4096 /home

After a while, there's a write error.

I've tried several block-sizes, 2048, 1024 and so on.

Even tried pipe to dd with: tar cvf - /home | dd ibs=10240 obs=1M of=/dev/st0

Same errors. With some block-sizes, I can write 50 GB on the tape, then there's a write error. Other times I can only write 5 GB.

What's the right way, using tar or cpio, to write to a ULT3580-HH6 IBM drive ?

Regards Thomas

What is the exact error? After the write-error, anything helpful in dmesg output or in syslog?

Have you run IBM diags tool:
https://www-01.ibm.com/support/docvi...d=ssg1S4000662

Are there any error codes on the tape drive itself?

Hi,

No error codes on the tape drive. I haven't run diags.

When doing a backup of 23 GB, using 256k blocksize, no errors. But when reading the tape I get a read error after 3-4 Gb read and dmesg says:

[ 720.416206] mpt3sas_cm0: fault_state(0x2100)!
[ 720.416216] mpt3sas_cm0: sending diag reset !!
[ 721.164170] mpt3sas_cm0: diag reset: SUCCESS
[ 721.164812] st 1:0:0:0: [st0] Error 80000 (driver bt 0x0, host bt 0x8).
[ 721.277051] mpt3sas_cm0: SAS3408: FWVersion(05.125.02.00), ChipRevision(0x01), BiosVersion(00.00.00.00)
[ 721.277060] mpt3sas_cm0: Protocol=(
[ 721.277063] Initiator
[ 721.277067] ,Target
[ 721.277069] ),
[ 721.277072] Capabilities=(
[ 721.277074] TLR
[ 721.277077] ,EEDP
[ 721.277079] ,Diag Trace Buffer
[ 721.277083] ,Task Set Full
[ 721.277084] ,NCQ
[ 721.277087] )
[ 721.277128] mpt3sas_cm0: sending port enable !!
[ 729.363369] mpt3sas_cm0: port enable: SUCCESS
[ 729.363382] mpt3sas_cm0: search for end-devices: start
[ 729.363783] scsi target1:0:1: handle(0x0009), sas_addr(0x510600b00dbd7fb0)
[ 729.363790] scsi target1:0:1: enclosure logical id(0x500605b00dbd7fb0), slot(8)
[ 729.363876] scsi target1:0:0: handle(0x000a), sas_addr(0x5005076312564d18)
[ 729.363882] scsi target1:0:0: enclosure logical id(0x500605b00dbd7fb0), slot(0)
[ 729.363968] mpt3sas_cm0: search for end-devices: complete
[ 729.363971] mpt3sas_cm0: search for expanders: start
[ 729.363975] mpt3sas_cm0: search for expanders: complete
[ 729.363986] mpt3sas_cm0: _base_fault_reset_work: hard reset: success
[ 729.363994] mpt3sas_cm0: removing unresponding devices: start
[ 729.364002] mpt3sas_cm0: removing unresponding devices: end-devices
[ 729.364007] mpt3sas_cm0: removing unresponding devices: expanders
[ 729.364011] mpt3sas_cm0: removing unresponding devices: complete
[ 729.364017] mpt3sas_cm0: scan devices: start
[ 729.364205] mpt3sas_cm0: scan devices: expanders start
[ 729.364257] mpt3sas_cm0: break from expander scan: ioc_status(0x0022), loginfo(0x310f0400)
[ 729.364261] mpt3sas_cm0: scan devices: expanders complete
[ 729.364264] mpt3sas_cm0: scan devices: end devices start
[ 729.364800] mpt3sas_cm0: break from end device scan: ioc_status(0x0022), loginfo(0x310f0400)
[ 729.364803] mpt3sas_cm0: scan devices: end devices complete
[ 729.364807] mpt3sas_cm0: scan devices: complete


BR Thomas

hi any luck with this one?

There was an driver update for the tape-controller.

Only for RedHat, but i made it work on Cent OS..

It works now :-)

thanks a lot for your quick reply..

On Lenovo/IBM's web-site, I found the following driver: lnvgy_dd_mpt3sas_25.125.01.00-3_rhel7_x86-64.tgz

After extracting, I had to rename RPMS/redhat-release-server-7.5/ to RPMS/centos-release-7-5 ;-)
Maybe I also had to change /etc/redhat-release: Substitue Cent OS with RedHat.

Then I could run ./install.sh

It's a little hack, but look in install.sh.

BR