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LinearTapeFileSystem / ltfs

Reference implementation of the LTFS format Spec for stand alone tape drive
BSD 3-Clause "New" or "Revised" License
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LTO 7 mounting sporadically not possible #39

Closed misc2012-DE closed 6 years ago

misc2012-DE commented 6 years ago

Description

After formating the Tape, mounting is not possible, i always get the following error , 6a0 LTFS11332I Load successful. 6a0 LTFS17157I Changing the drive setting to write-anywhere mode. 6a0 LTFS11005I Mounting the volume. 6a0 LTFS30252I Logical block protection is disabled. 6a0 LTFS30200I Failed to execute SG_IO ioctl, opcode = 08 (22). 6a0 LTFS30263I READ returns ioctl error (-21700) /dev/st0. 6a0 LTFS12049E Cannot read: backend call failed (-21700). 6a0 LTFS17041E XML parser: read failed while looking for a file mark (-21700). 6a0 LTFS17037E XML parser: failed to read from XML stream. 6a0 LTFS17016E Cannot parse index direct from medium. 6a0 LTFS11194W Cannot read index: failed to read and parse XML data (-1014). 6a0 LTFS11024E Cannot mount volume: read index failed on the index partition. 6a0 LTFS14013E Cannot mount the volume. 6a0 LTFS30252I Logical block protection is disabled.

upd: To ensure that the Hardware isn't broken i checked it under Windows 2012 Server R2, everything works very well.

Environment

How to recreate

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piste-jp commented 6 years ago

It looks little bit funny.

Could you provide the entire log and command line you kicked?

By the way, from the log provided at this time...

piste-jp commented 6 years ago

Close this issue because no progress was made in this 4 months.

whinpo commented 5 years ago

Hi,

We encountered exactly the same error. Looking at this issue allowed us to understand the reason (st isn't supported)

We've found a workaround : lsscsi -g shows the right sg device to use (instead of /dev/st0) [5:0:0:0] tape IBM ULT3580-HH8 JAYF /dev/st0 /dev/sg2 [5:0:0:1] mediumx IBM 3572-TL 0106 /dev/sch0 /dev/sg3

then use ltfs -o devname=/dev/sg2 and the the ltfs command works smoothly :)

Thanks again for your hard work on the ltfs support.

piste-jp commented 5 years ago

Hi, Thank you for using LTFS.

I wrote the Wiki that describes how to use LTFS. To list the usable device, you can use the command ltfs -o device_list.

See in detail https://github.com/LinearTapeFileSystem/ltfs/wiki/Quick-start#list-tape-drives

whinpo commented 5 years ago

Hi,

I tried it but it returned nothing

root@xxxxxx:~# ltfs -o device_list
5962 LTFS14000I LTFS starting, LTFS version 2.4.2.0 (Prelim), log level 2.
5962 LTFS14058I LTFS Format Specification version 2.4.0.
5962 LTFS14104I Launched by "ltfs -o device_list".
5962 LTFS14105I This binary is built for Linux (x86_64).
5962 LTFS14106I GCC version is 7.4.0.
5962 LTFS17087I Kernel version: Linux version 4.18.0-15-generic (buildd@lcy01-amd64-029) (gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #16~18.04.1-Ubuntu SMP Thu Feb 7 14:06:04 UTC 2019 i386.
5962 LTFS17089I Distribution: DISTRIB_ID=Ubuntu.
5962 LTFS17089I Distribution: NAME="Ubuntu".
5962 LTFS17085I Plugin: Loading "sg" tape backend.
Tape Device list:.
root@xxxxxx:~#
piste-jp commented 5 years ago

It's interesting... It works fine in my RHEL7 box.

I don't have any Ubuntu environment (with physical drive) at this time (I always checks functionality on Ubuntu only with the filebackend). But I will check on Ubuntu 16.04 (Xenial) on my spare time.

[piste@localhost ~]$ ~/ltfs05-oss-master/bin/ltfs -o device_list
1819 LTFS14000I LTFS starting, LTFS version 2.4.2.0 (Prelim), log level 2.
1819 LTFS14058I LTFS Format Specification version 2.4.0.
1819 LTFS14104I Launched by "/home/piste/ltfs05-oss-master/bin/ltfs -o device_list".
1819 LTFS14105I This binary is built for Linux (x86_64).
1819 LTFS14106I GCC version is 4.8.5 20150623 (Red Hat 4.8.5-36).
1819 LTFS17087I Kernel version: Linux version 3.10.0-514.10.2.el7.x86_64 (mockbuild@x86-039.build.eng.bos.redhat.com) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC) ) #1 SMP Mon Feb 20 02:37:52 EST 2017 i386.
1819 LTFS17089I Distribution: NAME="Red Hat Enterprise Linux Server".
1819 LTFS17089I Distribution: Red Hat Enterprise Linux Server release 7.6 (Maipo).
1819 LTFS17089I Distribution: Red Hat Enterprise Linux Server release 7.6 (Maipo).
1819 LTFS17085I Plugin: Loading "sg" tape backend.
Tape Device list:.
Device Name = /dev/sg32, Vendor ID = IBM     , Product ID = ULT3580-TD5     , Serial Number = 1068000016, Product Name =[ULT3580-TD5].
Device Name = /dev/sg30, Vendor ID = IBM     , Product ID = ULT3580-TD5     , Serial Number = 1068000070, Product Name =[ULT3580-TD5].
Device Name = /dev/sg46, Vendor ID = IBM     , Product ID = ULT3580-TD7     , Serial Number = 1013000730, Product Name =[ULT3580-TD7].
Device Name = /dev/sg44, Vendor ID = IBM     , Product ID = ULT3580-TD7     , Serial Number = 00078D0215, Product Name =[ULT3580-TD7].
Device Name = /dev/sg18, Vendor ID = IBM     , Product ID = ULT3580-TD5     , Serial Number = 00078A1D8F, Product Name =[ULT3580-TD5].
Device Name = /dev/sg36, Vendor ID = IBM     , Product ID = 0359260F        , Serial Number = 0000078PG1ED, Product Name =[0359260F].
Device Name = /dev/sg20, Vendor ID = IBM     , Product ID = 0359255F        , Serial Number = 0000013DFF44, Product Name =[0359255F].
Device Name = /dev/sg42, Vendor ID = IBM     , Product ID = ULT3580-TD6     , Serial Number = 00078B00F3, Product Name =[ULT3580-TD6]
lucasvr commented 5 years ago

@whinpo, could you post the output of strace -e trace=file ltfs -o device_list so we can rule out some reasons for the issue?

whinpo commented 5 years ago

I've just noticed it's working under root but not under a normal user login I attach both strace

strace-ltfs-normal-root.txt strace-ltfs-normal-user.txt

lucasvr commented 5 years ago

This can be fixed by changing the ownership of /dev/sg2:

openat(AT_FDCWD, "/dev/sg2", O_RDONLY|O_NONBLOCK) = -1 EACCES (Permission denied)

You may want to add your whssi user to the group who owns /dev/sg2, and make that file writable by that group.