19
votes
Accepted
What does it mean, if all LEDs of an LTO-6 drive are flashing?
I googled a few examples of LTO-6 tape drives, and they all seem to have basically the same LEDs, although their arrangement varies by OEM and form factor:
encryption
cleaning required
tape (error)
...
6
votes
Accepted
HP Ultrium 1840 LTO-4 slow write speeds
You don’t have differential cabling so HBA is switching into UltraWide mode. Get proper cable in between your HBA and SCSI device.
https://ask.adaptec.com/app/answers/detail/a_id/11007/~/scsi-...
5
votes
What does it mean, if all LEDs of an LTO-6 drive are flashing?
Assuming its a HP drive...
Its broken.
Considering you can't insert a tape... call for service
4
votes
Device busy when reading from tape drive with tar
Did you also write with the same block size?
Did you rewind beforereading?
Does mt -f /dev/nst0 status work?
Are you chaining dd with tar or just using tar as you wrote? There is a quirk when using ...
4
votes
Accepted
Which SAS cable to connect an internal HP LTO-5 tape drive?
Internal SAS drives usually have SFF-8482 connectors.
https://en.wikipedia.org/wiki/Serial_Attached_SCSI#Connectors
4
votes
Accepted
Can SAS Tape Drive (HP StoreEver 6250) used with LSI SAS 9200-8e-HP?
Both are older 6 Gb/s SAS, both come from the same vendor (HP).
https://www.storagereview.com/review/hp-storeever-lto-6-ultrium-6250-review-eh970a
https://docs.broadcom.com/doc/12352378
I believe you’...
4
votes
Magnetic tape alternative
Not having business requirements is a big red flag - so I strongly suggest to understand what is required before investing in any solution.
That said, to save large amount of off-site data I can ...
3
votes
Accepted
Can I connect HP Ultrium 1760 drive to LSI Logic SAS 3041E controller using the cable on the picture
Yes - actually both variants would do. SFF-8482 is the standard internal SAS device interface.
I'd prefer the adapter cable since it doesn't introduce additional connections. Watch out for the power ...
3
votes
What are the IOPS and physical block size for modern magnetic tapes?
Physical tape is a sequential medium, so forget about (random access) IOPS. I've got some 90 seconds maximum rewind time in my head for LTO. Translated to 45 seconds mean access time, you'd get .02 ...
3
votes
LTO-4 Tape Write Source Throughput Needs
The mbuffer is a small and handy tool which can help you to maintain sustained data flow to the tape drive. It’s available on most linux distributions.
mbuffer - buffers I/O operations and ...
3
votes
Quantum Scalar i80 - I see the tape drive, but not changer
I know this is an ancient post , but the changer will be accessed by an 'sg' device , ie scsi generic. If you are running Linux , it will already have sg support.
sg provides a lower level interface ...
3
votes
Fibre channel: LTO tape overwritten on bus reset
This is a known problem with tape drives, and the way that they are trivially-easy to rewind merely by looking sideways at the device (ie, opening it in the wrong way - via the rewinding device - just ...
2
votes
How can I discover the content of a non-descript LTO3?
I would just dd the first say 8k to a file dd if=/dev/nst0 of=file.dat bs=8k count=1, then use file, or strings, or hexdump, or od, or something to examine the contents. Perhaps there is some header ...
2
votes
Moving data to tape
To display status of the tape/drive use:
mt status #Use default
mt -f /dev/rmt/0 status #Unix
mt -f /dev/st0 status #Linux
mt -f /dev/nsa0 status #FreeBSD
mt -f /dev/rmt/1 status #Unix unity 1 i....
2
votes
Magnetic tape alternative
First, figure out the rough amount of data you'd need to transfer, and compare it to the network bandwidth available on-site. If you find you'd need to get a new fiberoptic line into a site that's &...
1
vote
Magnetic tape alternative
When your main concern is the valuable time you spent driving - consider simply out-sourcing the task of changing the tapes.
Most datacenters offer a remote hands service for what is probably not ...
1
vote
Maximum write speed of HP Ultrium 1760 drive
SAS runs at least 3 Gbit/s = 300 MB/s goodput. The drive is rated at 120 MB/s max (240 MB/s w/ 2:1 compression), so adding the second lane doesn't do anything.
Your SAS HBA uses SATA-style ports but ...
1
vote
Fibre Channel Ports and Tape Library
I had performance problems with an IBM TS3100 a while ago. My troubleshooting log from that contains the following:
The tape drive needed to be set to N-port mode.
The tape drive had an 8Gbps FC ...
1
vote
Fiber tape changer missing on lsscsi
I just found out that, on the Library Type configuration on the TL are two options: Random and Sequential. I've changed it to sequential, thinking that it was going to force the Library to use the ...
1
vote
LTO-4 Tape Write Source Throughput Needs
The manual I've found lists variable speeds from 30.5 to 120 MB/s in ~7 MB/s increments.
Additionally, LTO drives use reasonably sized buffers to equalize the data stream and provide an indicator for ...
1
vote
Accepted
bareos Using both tape drives (not multiplexing)
From the BareOS documentation:
As a default, Bareos jobs will prefer to write to a Volume that is
already mounted. If you have a multiple drive autochanger and you want
Bareos to write to more ...
1
vote
8mm Data8 tape drive compatibility for Maxell HS-8/112 and 3M D8-112
if you have just used an MP tape in the drive , the drive will reject the AME tape. You can reset this by putting a cleaning cartridge through.
Stupid idea , but there you are.
The drive reads MP ...
1
vote
Link between tape drive library index and its serial number on linux
Not possible.
I've last looked at this in 2008, but there was no such universal method. Generally SCSI protocol (+descendants) for a tape library lacked at the time the possibility to ask a tape ...
1
vote
Quantum LTO-4 Drive fails with new tapes and need to be cleaned too often
Replacing the tapes was probably a bad idea. Back in the days where I was administrating LTO-4 drives it was entirely normal for brand new tapes to be covered in a tiny amount of debris left over from ...
1
vote
Simple backup tape wiping, from linux shell?
If you want every bit of data scrubbed from the drive, mt erase (long erasure) is the way to go. If you can accept the minimal risk of someone with specialized hardware reading your tapes, a short ...
1
vote
Is there a version of mt for windows, or something similar?
I also needed a reliable mt on Windows 10.
The most reliable I found is Hamilton C shell's mt version.
They offer a full working demo version. If one wish to run mt.exe independently, then license ...
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