Hello Emanuel

I am using this device, its an Ultrium 5 (LTO5)
Its an older changer and I am unable to update the firmware, still working on 
that.

What version of mt are you using, as I am testing using a RHEL7.2 base and the 
upstream patched kernel.

Linux example.redhat.com 4.3.3 #1 SMP Tue Jan 5 15:58:47 EST 2016 x86_64 x86_64 
x86_64 GNU/Linux

# tapeinfo -f /dev/st0
Product Type: Tape Drive
Vendor ID: 'QUANTUM '
Product ID: 'ULTRIUM 5       '
Revision: '3060'
Attached Changer API: No
SerialNumber: 'HU1023AKHE'
MinBlock: 1
MaxBlock: 16777215
SCSI ID: 0
SCSI LUN: 0
Ready: yes
BufferedMode: yes
Medium Type: Not Loaded
Density Code: 0x58
BlockSize: 512
DataCompEnabled: yes
DataCompCapable: yes
DataDeCompEnabled: yes
CompType: 0x1
DeCompType: 0x1
BOP: yes
Block Position: 0
Partition 0 Remaining Kbytes: 1541692
Partition 0 Size in Kbytes: 1541692
ActivePartition: 0
EarlyWarningSize: 0
NumPartitions: 0
MaxPartitions: 0

Drive is working fine,

# mt -f /dev/st0 status
SCSI 2 tape drive:
File number=0, block number=0, partition=0.
Tape block size 512 bytes. Density code 0x58 (no translation).
Soft error count since last status=0
General status bits on (41010000):
 BOT ONLINE IM_REP_EN

This is what I get when I try and partition and I believe this may be a 
firmware issue for me.

mt -f /dev/st0  stsetoption can-partitions

[ 5343.620005] st 0:0:0:0: [st0] Block limits 1 - 16777215 bytes.
[ 5343.621424] st 0:0:0:0: [st0] Mode sense. Length 11, medium 0, WBS 10, BLL 8
[ 5343.622005] st 0:0:0:0: [st0] Density 58, tape length: 0, drv buffer: 1
[ 5343.622606] st 0:0:0:0: [st0] Block size: 512, buffer size: 4096 (8 blocks).
[ 5343.623208] st 0:0:0:0: [st0] Mode 0 options: buffer writes: 1, async 
writes: 1, read ahead: 1
[ 5343.623810] st 0:0:0:0: [st0]     can bsr: 1, two FMs: 0, fast mteom: 0, 
auto lock: 0,
[ 5343.624413] st 0:0:0:0: [st0]     defs for wr: 0, no block limits: 0, 
partitions: 1, s2 log: 0
[ 5343.625011] st 0:0:0:0: [st0]     sysv: 0 nowait: 0 sili: 0 nowait_filemark: 0
[ 5343.625623] st 0:0:0:0: [st0]     debugging: 1
[ 5343.626222] st 0:0:0:0: [st0] Rewinding tape.

# mt -f /dev/nst0  mkpartition 1
/dev/nst0: Input/output error





Laurence Oberman
Principal Software Maintenance Engineer
Red Hat Global Support Services

----- Original Message -----
From: "Emmanuel Florac" <eflo...@intellique.com>
To: "Laurence Oberman" <lober...@redhat.com>
Cc: "Laurence Oberman" <oberma...@gmail.com>, "Kai Makisara" 
<kai.makis...@kolumbus.fi>, linux-scsi@vger.kernel.org
Sent: Wednesday, January 6, 2016 10:10:49 AM
Subject: Re: st driver doesn't seem to grok LTO partitioning

Le Tue, 5 Jan 2016 16:55:04 -0500 (EST)
Laurence Oberman <lober...@redhat.com> écrivait:

> mt -f /dev/nst0  mkpartition 1
> 

What is the type of drive exactly? I still couldn't test with the LTO-5
drive as the machine it's connected to is being reinstalled.

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