Questions tagged [lto]

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

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36 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 ...
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1answer
85 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 ...
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1answer
172 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 ...
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3answers
96 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 (...
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1answer
119 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 ...
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68 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 ...
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2answers
122 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 ...
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2answers
541 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 ...
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2answers
3k 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 ...
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1answer
308 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 #...
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3answers
73 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 ...
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1answer
412 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 ...
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3answers
364 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 ...
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2answers
582 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 ...
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3answers
756 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 ...
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3answers
572 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 -...
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1answer
926 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 -...
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1answer
79 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?...
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1answer
182 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 ...
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2answers
2k 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 ...
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1answer
241 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 ...
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654 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:...
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4answers
529 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.) ...
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1answer
195 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,...
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2answers
3k 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 ...
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4answers
9k 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, ...
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0answers
224 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 ...
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4answers
874 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 ...
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1answer
160 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 ...
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2answers
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 ...
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2answers
811 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 ...
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1answer
536 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 ...
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1answer
1k 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 ...
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1answer
145 views

Do non sticky LTO barcode labels exist? [closed]

I don't rip off old LTO labels that often, but it is very annoying when I do have to do it. Is there a stickerless solution? Perhaps stick on clear sleeves or plastic tabs that hold removable labels?
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2k views

LTO 5 tape rotation best practices - Lifetime

What is the general best practice for keeping LTO 5 tapes in a rotation? I have read that they have archival capability of 30 years, but I am sure this really depends on how much you're reading and ...
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1answer
2k views

Connecting our first tape drive (SAS) to SATA bus

Our small team is considering buying our first tape drive for backups. However, we are still lacking serious enterprise-grade servers and have to rely temporarily on SATA drives in our rigs. Cost ...
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2answers
192 views

What other tape manufacturers can I use in IBM LTO Gen 3 SAS Tape Drives

I have recently just got my hands on an IBM 3580S3V. I was just wondering if there are any other brands that I can use in this IBM gear? LTO media are usually manufactured only by EMTEC, Imation, ...
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4answers
829 views

How Serviceable are Tape Drives?

I'm contemplating an auto-loading tape drive as part of a backup strategy. This would be my first experience with tape backup. The cost-effectiveness of tape drives seems to depend on the assumption ...
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2answers
887 views

LTO 2 tape performance in LTO 3 drive

I have a pile of LTO 2 tapes, and both an LTO 2 drive (HP Ultrium 460e), and an autoloader with an LTO 3 drive in (Tandberg T24 autoloader, with a HP drive). Performance of the LTO 2 tapes in the LTO ...
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3answers
1k views

Is it possible to connect an HP 1760 SCSI Tape to a regular NON server board PC?

I own an Ultrium HP Tape 1760 SCSI, that used to reside on a Dell 2850, on an LSI SCSI card. That Server is now R.I.P. Sad to say. I want to connect the Tape to another PC, is it possible? What ...
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1answer
2k views

LTO Ultrium 2 - free management software

i'm making backup using ntbackup to write on LTO Ultrium 2 cartridges ( http://en.wikipedia.org/wiki/Linear_Tape-Open ). All worked fine till last week when suddenly all cartridges are rejected (for ...
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2answers
8k views

data protector red tapes

I am using HP Data Protector A.06.11 in my organization, with HP EML E-SeriesEML library, with 4 drives using LTO-4 tapes, and i am having some problems. Yesterday I put 5 new tapes in the robot and ...
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1answer
255 views

boot IBM p series 650 from 3580-L23 LTO-2 tape

We have a p series 650 that has a dds4 tape drive built-in. In the past, recover has been as simple as putting a mksysb tape into the drive and booting the machine. During boot, the machine detects ...
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1answer
668 views

ntbackup asks for a free media LTO-1, but shouldn't

I'm facing this problem: on Windows 2003 server STD, I can't safely perform unattended data backup on tape (HP LTO-1 drive) because it asks for a free media tape after 90GB of data written. The ...
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6answers
14k views

Difference between LTO half-height and full-height drives?

I've noticed that most tape drive vendors provide two options: full-height or half-height. The half-height drives are physically smaller and less expensive, yet seem to have identical specifications ...
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3answers
12k views

How to write to a tape using hardware compression on Linux?

I have an LTO-4 tape connected to a Linux host and Linux creates all the usual devices for this tape as follows: /dev/nst0 /dev/nst0a /dev/nst0l /dev/nst0m /dev/st0 /dev/st0a /dev/st0l /dev/st0m I ...