Skip to main content
Share Your Experience: Take the 2024 Developer Survey

Questions tagged [lto]

Linear Tape Open is a family of tape specifications ranging from 100 GB (LTO-1) to 12 TB (LTO-8).

Filter by
Sorted by
Tagged with
0 votes
1 answer
30 views

Possible to use two tape drives alternately with tar?

I have a two drive, 24 slot LTO library. I am testing the use of a script on the tar command "--new-volume-script=COMMAND" that when called, contains the changer "mtx -f /dev/sg2 next&...
CncJerry's user avatar
-1 votes
1 answer
52 views

Testing IBM LTO 7 hh drive out of its library tray

I am trying to diagnose a library drive for wich I don´t have a library. It belongs to a ibm 4300 library. I connected an atx psu to the mini molex 4 pin connector on the drive, and as soon as I turn ...
satantango's user avatar
2 votes
0 answers
59 views

trouble with Oracle Sun SAS 6GB/s pci-e drivers

I got a new card for my server, a Sun SAS card (SG-XPCIESAS-GEN2-Z), and now I cannot get it to work. I tried many LSI drivers, many Adaptec drivers, but none work, some even crash. Card P/N is ...
M B's user avatar
  • 21
0 votes
1 answer
240 views

What are the IOPS and physical block size for modern magnetic tapes?

It's obvious that magnetic tape media performs IO operations as well as HDDs and SSDs, although this storage device is not designed for a random access pattern. LTO standards define maximal data ...
Vitaly Isaev's user avatar
0 votes
1 answer
187 views

LTO6 drive asking firmware update but does not accept it

I recently pulled an ibm LTO 6 fh fibre drive from a library and was using it in standalone mode in a windows 10 pc where I use other sas drives. It was working just fine. Yesterday I turn it on to ...
satantango's user avatar
0 votes
0 answers
75 views

Read LTO memory chip with a drive older than the tape

That is the question. Can I read the data inside the memory chip of a lto7 tape using an lto6 drive? I have only tried ITDT on windows but it rejects to do anything with the tape. Just asking in case ...
satantango's user avatar
4 votes
0 answers
88 views

Read LTO Tape ID Tag

LTO 6 Tapes contain a ID tag within the casing (I assume its RFID). Is it possible to read the tag via mt commands? I would like to identify the tape that is currently loaded in the tape drive. I'm ...
Jotschi's user avatar
  • 41
2 votes
1 answer
89 views

Are sony lto6 tapes mp or bf?

Most lto tapes specify MP or BaFe on their labels. Sony ltx2500g tapes dont. I have two ibm lto6 decks and want to try to keep different tape brands and particle formulations on different machines ...
satantango's user avatar
4 votes
3 answers
2k views

Turning an IBM lto6 sas HH drive from library to standalone, how?

new here. I have been using a stand alone lto6 hh drive (ibm ts2260/3580 h6s) for two years. Just recently I bumped into an almost new ibm ts2900 autoloader with an hh lto6 drive in it and bought it. ...
satantango's user avatar
5 votes
1 answer
308 views

LTO-8 tapes long-term storage rules

I have a bunch of tapes LTO-8 written in LTFS by HPE tape-drive. I can not find any rules for reliable physical storage for the tapes. I have an anti-magnetic case for them, but maybe there are some ...
Oleg Borisenko's user avatar
0 votes
1 answer
295 views

tar/dd - Error writing to tape drive - Device or resource busy

I tried to pipe tar to dd and use dd to write to tape in order to have progress: export TAPE=/dev/nst0 tar -b 128 -c *| dd of=$TAPE bs=65536 status=progress However I got an error tar: /dev/nst0: ...
NickSoft's user avatar
  • 288
0 votes
2 answers
521 views

Maximum write speed of HP Ultrium 1760 drive

The write speed of the HP Ultrium 1760 drive is specified as 120MB/s with LTO-4 media and 80MB/s with LTO-3 media. However I get half of that - 80/40 MB/s respectively. The connector is SFF-8482 at ...
NickSoft's user avatar
  • 288
2 votes
1 answer
2k views

Can I connect HP Ultrium 1760 drive to LSI Logic SAS 3041E controller using the cable on the picture

I want to connect HP StorageWorks LTO-4 Ultrium 1760 tape drive to LSI SAS 3041E controller using the cable on the photo. The cable is advertised as 0.7M Mini SFF-8482 to SAS 29P SATA . Or an adapter ...
NickSoft's user avatar
  • 288
2 votes
3 answers
4k views

Tape drive Connectivity - Fiber channel Vs SAS

We want to change our tape backup system and acquire a LTO8 tape drive. Something that I cannot find the answer easily is what are the pro&con of the connectivty by Fiber channel or SAS. For the ...
Vindic's user avatar
  • 141
1 vote
1 answer
709 views

Mac - Thunderbolt eGPU + PCIe SAS card for LTO tape drive (SAS card compatibility)

I'm looking for open minded person who can answer my unusual question that might defy logic at first glance but might be valid. Recently I got need for reading LTO tapes that act as archive. I would ...
electronicnoobblog's user avatar
1 vote
0 answers
31 views

Tape always return zeros from files but with good length

I have a IBM LTO-3 ULT3580-TD3. When I try write something to tape always it returns only zeros but with good length (/size). # dd if=/media/test1 of=/dev/nst0 bs=64k # dd if=/dev/nst0 of=/media/...
Piotr Sikora's user avatar
5 votes
2 answers
520 views

Tape backup software for putting multiple backup sets on one tape [closed]

I'm currently trying to install a new tape backup environment (LTO 7, hardware is already set up). As LTO 7 tapes provide a LOT of data space (6/15TB per tape), and the backups that need to be stored ...
Daniel's user avatar
  • 73
3 votes
0 answers
370 views

Restore LTFS formatted LTO drive with heavily fragmented data

I'm currently experiencing one of those nice foobar situations where the primary backup of a certain project died and the secondary backup was written on and LTFS formatted LTO-6 - apparently by ...
Michael Auerswald's user avatar
0 votes
1 answer
825 views

Configure single LTO tape drive over Fiber Channel HBA

How do you set up a single tape storage drive over an FC HBA? As far as I can tell, these things are not "plug and play". The tape drive I bought is an lto-5 FC taken from a tape library. I have ...
teziroct's user avatar
5 votes
1 answer
2k views

What kind of algorithm is used in LTO tape hardware compression?

LTO tape drives, from their very first generation, offer hardware compression that, theoretically, allows a maximum of 2 - 2.5x the rated data capacity of each cartridge to be stored, with only a ...
Mikey T.K.'s user avatar
  • 1,417
2 votes
3 answers
622 views

Is it worth using WORM Media for archiving? (Not needed for legal purposes)

Apart from regular backups, there is some data that I want to archive (e.g., old projects that aren't needed anymore). I wonder if there is any benefit to using WORM media instead of regular tapes (...
Michael Stum's user avatar
  • 4,070
4 votes
2 answers
544 views

Are LTO Hardware compression and encryption standardized?

I'm about to setup a backup using an LTO-4 Drive. I know that drives are meant to be compatible to any tape within the past 3 generations (so I should be able to read an LTO-4 tape using an LTO-4, 5 ...
Michael Stum's user avatar
  • 4,070
2 votes
1 answer
397 views

Does fast-eod make difference with LTO tape?

mt-st has an option: fast-eod: space directly to eod (and lose file number) I run the eod operation with/without this option, but is seems no significant difference. Does fast-eod make difference ...
petertc's user avatar
  • 2,710
2 votes
2 answers
326 views

Do LTO tape drive move when switching partition?

As everyone already know, tape winds between BOT and EOT when reading/writing data in the same LTO partition. But what if a tape drive read data in different partitions? Will it move across wraps in ...
petertc's user avatar
  • 2,710
3 votes
2 answers
2k views

LTO-4 Tape Write Source Throughput Needs

I am looking to begin a tape backup regimen and am looking to keep data flowing to the tape drive in a sufficient manner (120+MBs target sustained) but cannot figure out how to do so without a ...
Damon's user avatar
  • 439
7 votes
2 answers
6k views

What does it mean, if all LEDs of an LTO-6 drive are flashing? [closed]

All LEDs of an half height LTO-6 drive are flashing with ~ 4 Hz. An LTO-5 tape is still inside, the drive does not react on commands, the flashing continues after a power cycle. I could not find the ...
Jonas Stein's user avatar
1 vote
1 answer
602 views

find out the file system from a tape

Is there any way to find out the file system from a tape under Linux (CentOS)? I need this to figure out if a tape is already LTFS or not. At the moment I know: mtx # for managing a tape library mt #...
jb_alvarado's user avatar
0 votes
3 answers
158 views

Reconnecting SAS equipment

I need to reconfigure the cabling between some LTO tape drives and a server. Are they plug and play or do I need to do any configuration? From what I've read so far, it seems that recycling the power ...
Rich M's user avatar
  • 273
1 vote
1 answer
923 views

How to configure the st kernel module for LTO-6 tape drives?

I found a hint to configure the st module in a mail from 2004 redhat mailinglist about a slow LTO-2 drive. modprobe st buffer_kbs=1024 max_buffers=128 max_sg_segs=128 blocking_open=1 Are similar ...
Jonas Stein's user avatar
4 votes
4 answers
1k views

What could cause a 'sense error' when setting LTO encryption?

I'm trying to set an encryption key on an LTO-4 drive under Linux. I successfully did this once, power cycled the drive, and now I cannot get the drive to accept the key again. The command I am ...
Malvineous's user avatar
  • 1,145
13 votes
2 answers
931 views

Do LTO tapes have spare/unused capacity?

As I understand it, LTO tapes write data in "wraps", where the first wrap unspools the tape into the drive, and the second wrap spools it back into the cartridge. This process is repeated a number of ...
Malvineous's user avatar
  • 1,145
5 votes
4 answers
2k views

What could cause an LTO drive to write at half its capacity?

I have an LTO4 drive that when given even new LTO4 tapes, only writes around 460GiB to the tape even though the tape's uncompressed capacity is supposed to be 800GB. I have noticed that in one ...
Malvineous's user avatar
  • 1,145
16 votes
5 answers
5k views

Determine remaining capacity of LTO tape

How can I determine how much space is remaining on an LTO tape? If I seek to the end and check the status, I can see I am on file number 17, but what I do not know is how large each file was. $ mt -...
Matt Clark's user avatar
1 vote
1 answer
3k views

tar throwing input/output error when reading from tape, but file is ok

I've written about 1.5TB of files onto a tape with tar -b 512 -clpMvf /dev/nst0 /path_to_stuff Everything worked well, no error messages. Now if I try to read it back from tape with tar -b 512 -...
vfxdev's user avatar
  • 111
6 votes
2 answers
408 views

Pre-labelled LTO-6/LTFS tape numbers- Are the tape numbers stored somewhere on the tape?

I have some Fujifilm LTO-6 tapes which come labelled with tape numbers. I'm writing a script and I would like to assign a variable from the tape number. Is this information stored anywhere on the tape?...
neilH's user avatar
  • 997
1 vote
1 answer
421 views

How can I discover the content of a non-descript LTO3?

I've been handed an LTO3 which has been written with content, but I have no idea how it was made. I've been given the task of finding out what is actually stored on the tape. I've tried the usual tar ...
neilH's user avatar
  • 997
2 votes
2 answers
4k views

Determining LTO 5 Tape Expiration?

On our production setup we are using LTO 5 for taking backup on weekly basis, Unfortunately we do not have any purchased document for LTO5 tapes due to which we are unable to predict the exact EOL(End ...
Mahesh Morankar's user avatar
4 votes
1 answer
432 views

Fibre channel: LTO tape overwritten on bus reset

There is a situation that we had at out customer that I'd like to understand better. Here's what happened: A library with LTO tape drives is connected to a fibre channel environment Archiving ...
matejk's user avatar
  • 111
3 votes
1 answer
1k views

Device busy when reading from tape drive with tar

When I try to read a tar from tape with tar tvbf 2048 /dev/nst0, it returns: tar: /dev/nst0: Cannot read: Device or resource busy tar: At beginning of tape, quitting now tar: Error is not recoverable:...
Guillaume Clercin's user avatar
1 vote
4 answers
1k views

Is it safe to use not ECC RAM for cold backup server?

I need home computer for simple backup task (just cronjob on Linux, it will run once per day): Download file from my production server (in datacenter, it's good server with Xeons & ECC RAM etc.) ...
Alexander Ovchinnikov's user avatar
1 vote
1 answer
274 views

Ultra slow LTO4 read/write (2-3MB/s) SCSI + LSI Ultra 320

So I've installed pcie SCSI card LSI Ultra 320 (which worked fine some time ago on Dell R710/ Dell 2950 with LTO3), during booting I have discovered that sync speed for LTO3 (ultrium 960) is only 40MB,...
mike86's user avatar
  • 35
3 votes
2 answers
5k views

Bacula: best practise for labeling and initial start

I'm currently starting with bacula for backup and have a few questions for best practices. Current situation: I want to back up a slow changing max. 12TB (currently 8TB) dataset to a external LTO4 ...
Henrik's user avatar
  • 708
19 votes
4 answers
14k views

Determining LTO Cleaning Tape Expiration?

I have some LTO tape drives, and use cleaning tapes as required, but the lifetime of the cleaning tapes is not as predictable as I would have expected. I'm looking for a way to query the system, ...
Tim S.'s user avatar
  • 569
2 votes
0 answers
283 views

Loose threader in LTO-5 SAS internal drive [closed]

Once more I have a tape drive issue. I started seeing lots and lots of hardware errors with our LTO-5 SAS drive within our Superloader 3 changer. The main upshot was that the drive would think a ...
ACKumen's user avatar
  • 61
1 vote
4 answers
1k views

Quantum LTO-4 Drive fails with new tapes and need to be cleaned too often

I have a Quantum LTO-4 HH Original Drive, and recently i'm getting a lot of problems with tapes. For a long time every 3-5 tapes, the drive asks me for a cleaning tape, but lately the drive needs to ...
Daniel Carrasco Marín's user avatar
1 vote
1 answer
180 views

Unitrends Work with LTO-6?

Has anyone been able to get a Unitrends appliance to work with an LTO-6 drive? I checked to compatibility matrix and while it does have a vague list of supported products is vague... and seemingly ...
user258123's user avatar
0 votes
2 answers
2k views

Backup strategy for millions of files in lots of directories

We have millions of files in lots of directories, for example: \00\00\00\00.txt \00\00\00\01.pdf \00\00\00\02.html ... so on \05\55\12\31.txt backing up these to tape is slow as backing up data in ...
Mark Price's user avatar
1 vote
2 answers
1k views

Is it possible to upgrade a LTO3 drive to LTO5 or LTO6?

We have a ML6000 Dell tape library with a LTO-3 drive (part number KU838). Can this drive support LTO-5 or LTO-6 via firmware upgrade? I could not find any information about this on Dell pages. Is ...
motobói's user avatar
  • 1,769
1 vote
1 answer
575 views

Backup exec LTO tape capacity shows as 17.8GB

I have come across administering a Backup Exec 10d system, and all its tapes show a Total Capacity of 17,8 GB while showing a Used Capacity of e.g. 281GB. The tapes are LTO2 so they should have 200GB ...
Envite's user avatar
  • 368
1 vote
1 answer
2k views

What are simple options for reading from LTO tape drive [closed]

The only way I know to read from an LTO tape drive is with big, heavy tools like Backup Exec. I am looking for a light weight or free tool that can read files from an LTO tape drive attached to a ...
Jonesome Reinstate Monica's user avatar