Re: LTO6 Tapetype?
As suggested, I ran amtapetype on my Superloader 3 LTO6 drive. It
took ~6 hours, here's the output:
- amtapetype -f /dev/st0
Device is busy. Amtapetype will retry forever; hit ctrl-C to quit.
Drive was busy for 38 seconds.
If this device is used in a changer, you may want to set timeouts appropriately.
Checking for FSF_AFTER_FILEMARK requirement
Applying heuristic check for compression.
Wrote random (uncompressible) data at 145956737.969231 bytes/sec
Wrote fixed (compressible) data at 148237312 bytes/sec
Compression: disabled
Writing one file to fill the volume.
File 1, block 38947409
Wrote 2501585797120 bytes at 154519 kb/sec
Writing smaller files (25015844864 bytes) to determine filemark.
define tapetype unknown-tapetype {
comment Created by amtapetype; compression disabled
length 2442954880 kbytes
filemark 7456397 kbytes
speed 154519 kps
blocksize 32 kbytes
}
# LEOM is not supported for this drive and kernel
--
Steve
--
Steven J. BackusComputer Systems Manager
University of Utah E-Mail: steven.bac...@utah.edu
Genetic EpidemiologyAlternate: bac...@math.utah.edu
391 Chipeta Way -- Suite D Office: 801.587.9308
Salt Lake City, UT 84108-1266 http://www.math.utah.edu/~backus
Re: LTO6 tapetype
sorry, no I hadn't disabled compression. Today I installed mt-st and following
the wiki I ran:
mt -f /dev/sg2 compression 0
mt -f /dev/sg2 defcompression 0
but when I now run amtapetype it still tells me:
Applying heuristic check for compression.
Wrote random (uncompressible) data at 73376008.2580645 bytes/sec
Wrote fixed (compressible) data at 101095833.6 bytes/sec
Compression: enabled
how can I make sure hardware compression is off?
On Apr 17, 2013, at 6:40 PM, Jean-Francois Malouin
jean-francois.malo...@bic.mni.mcgill.ca wrote:
* Abilio Carvalho abilio.carva...@bbp.ch [20130417 10:19]:
Well, since noone answered, I had to run amtapetype, so here it is if anyone
else needs it:
define tapetype LTO6 {
comment Created by amtapetype; compression enabled
length 2442818848 kbytes
filemark 1806 kbytes
speed 74006 kps
blocksize 32 kbytes
}
Hmmm, speed look way off. Native speed is 160MBs for LTO6...
Did you disable hardware compression before running amtapetype?
Also, you might want to test with larger blocksize, for LTO5 I use 2MB
with good results
hth,
jf
On Apr 16, 2013, at 3:24 PM, Abilio Carvalho abilio.carva...@bbp.ch wrote:
Hi, just a quick question, does anyone have a tape type for an LTO6 drive?
(Ideally an HP Ultrium 6 SCSI)
Thanks
Abilio
**
This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
the system manager.
This footnote also confirms that this email message has been swept by
Clearswift for the presence of computer viruses.
www.clearswift.com
**
Re: LTO6 tapetype
* Abilio Carvalho abilio.carva...@bbp.ch [20130430 10:36]:
sorry, no I hadn't disabled compression. Today I installed mt-st and
following the wiki I ran:
mt -f /dev/sg2 compression 0
mt -f /dev/sg2 defcompression 0
but when I now run amtapetype it still tells me:
Applying heuristic check for compression.
Wrote random (uncompressible) data at 73376008.2580645 bytes/sec
Wrote fixed (compressible) data at 101095833.6 bytes/sec
Compression: enabled
how can I make sure hardware compression is off?
Make sure you have a tape loaded.
Replace the tape drive scsi generic device sgX accordingly.
In case of LTO5 here is what I get:
~# tapeinfo -f /dev/sgX
Product Type: Tape Drive
Vendor ID: 'HP '
Product ID: 'Ultrium 5-SCSI '
...
DataCompEnabled: yes
DataCompCapable: yes
DataDeCompEnabled: yes
...
~# mt-st -f /dev/nst0 defcompression 0
~# tapeinfo -f /dev/sgX
...
DataCompEnabled: no
DataCompCapable: yes
DataDeCompEnabled: yes
hth,
jf
On Apr 17, 2013, at 6:40 PM, Jean-Francois Malouin
jean-francois.malo...@bic.mni.mcgill.ca wrote:
* Abilio Carvalho abilio.carva...@bbp.ch [20130417 10:19]:
Well, since noone answered, I had to run amtapetype, so here it is if
anyone else needs it:
define tapetype LTO6 {
comment Created by amtapetype; compression enabled
length 2442818848 kbytes
filemark 1806 kbytes
speed 74006 kps
blocksize 32 kbytes
}
Hmmm, speed look way off. Native speed is 160MBs for LTO6...
Did you disable hardware compression before running amtapetype?
Also, you might want to test with larger blocksize, for LTO5 I use 2MB
with good results
hth,
jf
On Apr 16, 2013, at 3:24 PM, Abilio Carvalho abilio.carva...@bbp.ch
wrote:
Hi, just a quick question, does anyone have a tape type for an LTO6
drive? (Ideally an HP Ultrium 6 SCSI)
Thanks
Abilio
Re: LTO6 tapetype
OK, this is odd. Here's what I get, can you guys help me figure this out?
$ mtx -f /dev/sg2 status
Storage Changer /dev/sg2:1 Drives, 8 Slots ( 0 Import/Export )
Data Transfer Element 0:Full (Storage Element 2 Loaded):VolumeTag = ABR832L6
Storage Element 1:Full :VolumeTag=ABR833L6
Storage Element 2:Empty
Storage Element 3:Empty
Storage Element 4:Empty
Storage Element 5:Empty
Storage Element 6:Empty
Storage Element 7:Empty
Storage Element 8:Empty
$ tapeinfo -f /dev/st0
Product Type: Tape Drive
Vendor ID: 'HP '
Product ID: 'Ultrium 6-SCSI '
Revision: '22CW'
Attached Changer API: No
SerialNumber: 'HU1246T9JH'
MinBlock: 1
MaxBlock: 16777215
SCSI ID: 0
SCSI LUN: 0
Ready: yes
BufferedMode: yes
Medium Type: Not Loaded
Density Code: 0x5a
BlockSize: 0
DataCompEnabled: no
DataCompCapable: yes
DataDeCompEnabled: yes
CompType: 0x1
DeCompType: 0x1
BOP: yes
Block Position: 0
ActivePartition: 0
EarlyWarningSize: 0
NumPartitions: 0
MaxPartitions: 3
$ amtapetype -c -f /dev/st0
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LC_CTYPE = UTF-8,
LANG = en_US.UTF-8
are supported and installed on your system.
perl: warning: Falling back to the standard locale (C).
Checking for FSF_AFTER_FILEMARK requirement
Applying heuristic check for compression.
Wrote random (uncompressible) data at 73472726.7096774 bytes/sec
Wrote fixed (compressible) data at 101229090.13 bytes/sec
Compression: enabled
NOTE: I mistyped my last email. I ran mt on /dev/st0, not sg2. this email has
the correct devices.
Thanks for the help so far, Jean-François
On Apr 30, 2013, at 4:51 PM, Jean-Francois Malouin
jean-francois.malo...@bic.mni.mcgill.ca wrote:
* Abilio Carvalho abilio.carva...@bbp.ch [20130430 10:36]:
sorry, no I hadn't disabled compression. Today I installed mt-st and
following the wiki I ran:
mt -f /dev/sg2 compression 0
mt -f /dev/sg2 defcompression 0
but when I now run amtapetype it still tells me:
Applying heuristic check for compression.
Wrote random (uncompressible) data at 73376008.2580645 bytes/sec
Wrote fixed (compressible) data at 101095833.6 bytes/sec
Compression: enabled
how can I make sure hardware compression is off?
Make sure you have a tape loaded.
Replace the tape drive scsi generic device sgX accordingly.
In case of LTO5 here is what I get:
~# tapeinfo -f /dev/sgX
Product Type: Tape Drive
Vendor ID: 'HP '
Product ID: 'Ultrium 5-SCSI '
...
DataCompEnabled: yes
DataCompCapable: yes
DataDeCompEnabled: yes
...
~# mt-st -f /dev/nst0 defcompression 0
~# tapeinfo -f /dev/sgX
...
DataCompEnabled: no
DataCompCapable: yes
DataDeCompEnabled: yes
hth,
jf
On Apr 17, 2013, at 6:40 PM, Jean-Francois Malouin
jean-francois.malo...@bic.mni.mcgill.ca wrote:
* Abilio Carvalho abilio.carva...@bbp.ch [20130417 10:19]:
Well, since noone answered, I had to run amtapetype, so here it is if
anyone else needs it:
define tapetype LTO6 {
comment Created by amtapetype; compression enabled
length 2442818848 kbytes
filemark 1806 kbytes
speed 74006 kps
blocksize 32 kbytes
}
Hmmm, speed look way off. Native speed is 160MBs for LTO6...
Did you disable hardware compression before running amtapetype?
Also, you might want to test with larger blocksize, for LTO5 I use 2MB
with good results
hth,
jf
On Apr 16, 2013, at 3:24 PM, Abilio Carvalho abilio.carva...@bbp.ch
wrote:
Hi, just a quick question, does anyone have a tape type for an LTO6
drive? (Ideally an HP Ultrium 6 SCSI)
Thanks
Abilio
**
This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
the system manager.
This footnote also confirms that this email message has been swept by
Clearswift for the presence of computer viruses.
www.clearswift.com
**
Re: LTO6 tapetype
As I understand it (from reading here) there is something set ON EACH TAPE
which
turns the compression back on. I've even run the amtapetype test on a brand
new tape,
and it turns the compression back on.
The fix is to overwrite that bit or whatever it is.Like this:
mt -f /dev/nst2 comp off
mt -f /dev/nst2 compression off
dd of=/dev/nst2 if=/dev/zero bs=32k count=3272#or 32728
then rewind and try the amtapetype again. This time it will tell you that
compression
finally off. And you'll get a better value for the tapetype, too.
I do this now for each new tape (and one for the old tapes too). THEN the
compress
will stay off, once the tape stops turning it back on.
I think. ;)
Deb Baddorf
Fermilab
On Apr 30, 2013, at 10:09 AM, Abilio Carvalho wrote:
OK, this is odd. Here's what I get, can you guys help me figure this out?
$ mtx -f /dev/sg2 status
Storage Changer /dev/sg2:1 Drives, 8 Slots ( 0 Import/Export )
Data Transfer Element 0:Full (Storage Element 2 Loaded):VolumeTag = ABR832L6
Storage Element 1:Full :VolumeTag=ABR833L6
Storage Element 2:Empty
Storage Element 3:Empty
Storage Element 4:Empty
Storage Element 5:Empty
Storage Element 6:Empty
Storage Element 7:Empty
Storage Element 8:Empty
$ tapeinfo -f /dev/st0
Product Type: Tape Drive
Vendor ID: 'HP '
Product ID: 'Ultrium 6-SCSI '
Revision: '22CW'
Attached Changer API: No
SerialNumber: 'HU1246T9JH'
MinBlock: 1
MaxBlock: 16777215
SCSI ID: 0
SCSI LUN: 0
Ready: yes
BufferedMode: yes
Medium Type: Not Loaded
Density Code: 0x5a
BlockSize: 0
DataCompEnabled: no
DataCompCapable: yes
DataDeCompEnabled: yes
CompType: 0x1
DeCompType: 0x1
BOP: yes
Block Position: 0
ActivePartition: 0
EarlyWarningSize: 0
NumPartitions: 0
MaxPartitions: 3
$ amtapetype -c -f /dev/st0
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LC_CTYPE = UTF-8,
LANG = en_US.UTF-8
are supported and installed on your system.
perl: warning: Falling back to the standard locale (C).
Checking for FSF_AFTER_FILEMARK requirement
Applying heuristic check for compression.
Wrote random (uncompressible) data at 73472726.7096774 bytes/sec
Wrote fixed (compressible) data at 101229090.13 bytes/sec
Compression: enabled
NOTE: I mistyped my last email. I ran mt on /dev/st0, not sg2. this email has
the correct devices.
Thanks for the help so far, Jean-François
On Apr 30, 2013, at 4:51 PM, Jean-Francois Malouin
jean-francois.malo...@bic.mni.mcgill.ca wrote:
* Abilio Carvalho abilio.carva...@bbp.ch [20130430 10:36]:
sorry, no I hadn't disabled compression. Today I installed mt-st and
following the wiki I ran:
mt -f /dev/sg2 compression 0
mt -f /dev/sg2 defcompression 0
but when I now run amtapetype it still tells me:
Applying heuristic check for compression.
Wrote random (uncompressible) data at 73376008.2580645 bytes/sec
Wrote fixed (compressible) data at 101095833.6 bytes/sec
Compression: enabled
how can I make sure hardware compression is off?
Make sure you have a tape loaded.
Replace the tape drive scsi generic device sgX accordingly.
In case of LTO5 here is what I get:
~# tapeinfo -f /dev/sgX
Product Type: Tape Drive
Vendor ID: 'HP '
Product ID: 'Ultrium 5-SCSI '
...
DataCompEnabled: yes
DataCompCapable: yes
DataDeCompEnabled: yes
...
~# mt-st -f /dev/nst0 defcompression 0
~# tapeinfo -f /dev/sgX
...
DataCompEnabled: no
DataCompCapable: yes
DataDeCompEnabled: yes
hth,
jf
On Apr 17, 2013, at 6:40 PM, Jean-Francois Malouin
jean-francois.malo...@bic.mni.mcgill.ca wrote:
* Abilio Carvalho abilio.carva...@bbp.ch [20130417 10:19]:
Well, since noone answered, I had to run amtapetype, so here it is if
anyone else needs it:
define tapetype LTO6 {
comment Created by amtapetype; compression enabled
length 2442818848 kbytes
filemark 1806 kbytes
speed 74006 kps
blocksize 32 kbytes
}
Hmmm, speed look way off. Native speed is 160MBs for LTO6...
Did you disable hardware compression before running amtapetype?
Also, you might want to test with larger blocksize, for LTO5 I use 2MB
with good results
hth,
jf
On Apr 16, 2013, at 3:24 PM, Abilio Carvalho abilio.carva...@bbp.ch
wrote:
Hi, just a quick question, does anyone have a tape type for an LTO6
drive? (Ideally an HP Ultrium 6 SCSI)
Thanks
Abilio
**
This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
the system manager.
This footnote also confirms that this email message has been
Re: LTO6 tapetype
On Tuesday 30 April 2013 21:34:11 Debra S Baddorf did opine:
As I understand it (from reading here) there is something set ON EACH
TAPE which turns the compression back on. I've even run the
amtapetype test on a brand new tape, and it turns the compression
back on.
The fix is to overwrite that bit or whatever it is.Like this:
mt -f /dev/nst2 comp off
mt -f /dev/nst2 compression off
dd of=/dev/nst2 if=/dev/zero bs=32k count=3272#or 32728
then rewind and try the amtapetype again.
Sorry to break that bubble, but it has been my experience that if your
rewind the tape, it will re-read that hidden header and turn compression
back on regardless.
The only solution I have found that worked was to
rewind
read the first 32k out to a scratch file
rewind
turn the compression off
write that scratch file back to the tape
rewind
check compression status, it finally should be off.
If you give the drive an excuse to read the header on the tape by rewinding
BEFORE you write anything, you will appear to be in a loop, and the only
way out is rewind, set the compression off and immediately write that
header scratch file back to the tape.
This time it will tell you
that compression finally off. And you'll get a better value for the
tapetype, too. I do this now for each new tape (and one for the old
tapes too). THEN the compress will stay off, once the tape stops
turning it back on.
I think. ;)
Deb Baddorf
Fermilab
On Apr 30, 2013, at 10:09 AM, Abilio Carvalho wrote:
OK, this is odd. Here's what I get, can you guys help me figure this
out?
$ mtx -f /dev/sg2 status
Storage Changer /dev/sg2:1 Drives, 8 Slots ( 0 Import/Export )
Data Transfer Element 0:Full (Storage Element 2 Loaded):VolumeTag =
ABR832L6
Storage Element 1:Full :VolumeTag=ABR833L6
Storage Element 2:Empty
Storage Element 3:Empty
Storage Element 4:Empty
Storage Element 5:Empty
Storage Element 6:Empty
Storage Element 7:Empty
Storage Element 8:Empty
$ tapeinfo -f /dev/st0
Product Type: Tape Drive
Vendor ID: 'HP '
Product ID: 'Ultrium 6-SCSI '
Revision: '22CW'
Attached Changer API: No
SerialNumber: 'HU1246T9JH'
MinBlock: 1
MaxBlock: 16777215
SCSI ID: 0
SCSI LUN: 0
Ready: yes
BufferedMode: yes
Medium Type: Not Loaded
Density Code: 0x5a
BlockSize: 0
DataCompEnabled: no
DataCompCapable: yes
DataDeCompEnabled: yes
CompType: 0x1
DeCompType: 0x1
BOP: yes
Block Position: 0
ActivePartition: 0
EarlyWarningSize: 0
NumPartitions: 0
MaxPartitions: 3
$ amtapetype -c -f /dev/st0
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LC_CTYPE = UTF-8,
LANG = en_US.UTF-8
are supported and installed on your system.
perl: warning: Falling back to the standard locale (C).
Checking for FSF_AFTER_FILEMARK requirement
Applying heuristic check for compression.
Wrote random (uncompressible) data at 73472726.7096774 bytes/sec
Wrote fixed (compressible) data at 101229090.13 bytes/sec
Compression: enabled
NOTE: I mistyped my last email. I ran mt on /dev/st0, not sg2. this
email has the correct devices.
Thanks for the help so far, Jean-François
On Apr 30, 2013, at 4:51 PM, Jean-Francois Malouin Jean-
francois.malo...@bic.mni.mcgill.ca wrote:
* Abilio Carvalho abilio.carva...@bbp.ch [20130430 10:36]:
sorry, no I hadn't disabled compression. Today I installed mt-st and
following the wiki I ran:
mt -f /dev/sg2 compression 0
mt -f /dev/sg2 defcompression 0
but when I now run amtapetype it still tells me:
Applying heuristic check for compression.
Wrote random (uncompressible) data at 73376008.2580645 bytes/sec
Wrote fixed (compressible) data at 101095833.6 bytes/sec
Compression: enabled
how can I make sure hardware compression is off?
Make sure you have a tape loaded.
Replace the tape drive scsi generic device sgX accordingly.
In case of LTO5 here is what I get:
~# tapeinfo -f /dev/sgX
Product Type: Tape Drive
Vendor ID: 'HP '
Product ID: 'Ultrium 5-SCSI '
...
DataCompEnabled: yes
DataCompCapable: yes
DataDeCompEnabled: yes
...
~# mt-st -f /dev/nst0 defcompression 0
~# tapeinfo -f /dev/sgX
...
DataCompEnabled: no
DataCompCapable: yes
DataDeCompEnabled: yes
hth,
jf
On Apr 17, 2013, at 6:40 PM, Jean-Francois Malouin Jean-
francois.malo...@bic.mni.mcgill.ca wrote:
* Abilio Carvalho abilio.carva...@bbp.ch [20130417 10:19]:
Well, since noone answered, I had to run amtapetype, so here it is
if anyone else needs it:
define tapetype LTO6 {
comment Created by amtapetype; compression enabled
length 2442818848 kbytes
filemark 1806 kbytes
speed 74006 kps
blocksize 32 kbytes
}
Hmmm, speed look way off. Native speed is
Re: LTO6 tapetype
Well, since noone answered, I had to run amtapetype, so here it is if anyone
else needs it:
define tapetype LTO6 {
comment Created by amtapetype; compression enabled
length 2442818848 kbytes
filemark 1806 kbytes
speed 74006 kps
blocksize 32 kbytes
}
On Apr 16, 2013, at 3:24 PM, Abilio Carvalho abilio.carva...@bbp.ch wrote:
Hi, just a quick question, does anyone have a tape type for an LTO6 drive?
(Ideally an HP Ultrium 6 SCSI)
Thanks
Abilio
**
This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
the system manager.
This footnote also confirms that this email message has been swept by
Clearswift for the presence of computer viruses.
www.clearswift.com
**
Re: LTO6 tapetype
* Abilio Carvalho abilio.carva...@bbp.ch [20130417 10:19]:
Well, since noone answered, I had to run amtapetype, so here it is if anyone
else needs it:
define tapetype LTO6 {
comment Created by amtapetype; compression enabled
length 2442818848 kbytes
filemark 1806 kbytes
speed 74006 kps
blocksize 32 kbytes
}
Hmmm, speed look way off. Native speed is 160MBs for LTO6...
Did you disable hardware compression before running amtapetype?
Also, you might want to test with larger blocksize, for LTO5 I use 2MB
with good results
hth,
jf
On Apr 16, 2013, at 3:24 PM, Abilio Carvalho abilio.carva...@bbp.ch wrote:
Hi, just a quick question, does anyone have a tape type for an LTO6 drive?
(Ideally an HP Ultrium 6 SCSI)
Thanks
Abilio
**
This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
the system manager.
This footnote also confirms that this email message has been swept by
Clearswift for the presence of computer viruses.
www.clearswift.com
**
