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Questions tagged [scsi]

Small Computer System Interface (SCSI) is a set of standards for physically connecting and transferring data between computers and peripheral devices.

The physical SCSI interfaces - originally used to attach peripherals like disks, scanners and tape drives - have mostly been superseded by and .

The SCSI command set that was originally defined for (parallel) SCSI buses has been carried forward with minimal change for use with , , Serial Attached SCSI , and other transport layers.

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HP ProLiant DL380 G4 SATA support?

I'm planning to get a second hand HP Proliant DL380 G4 and setup it as storage server, probably using NexentaStor and setup a ZFS system. But now I wonder does DL380 G4 can be convert or support SATA hard disks? SCSI hard disk will not be enough…
hoon
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Performance differences between 2.5" vs. 3.5" SAS

What real performance gains/losses are there on 2.5" vs. 3.5" 15k SAS drives. Are folks really seeing seek differences, &c?
Jé Queue
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Network Drive attached as SCSI Dropping the W/R speed on bigger files

I'm having Network disk attached a SCSI disk When copying smaller files like 700MB or even 1 GB, speed is high , from 90MB/s to 120 MB, so I'm capable to benefit from 1Gbit network. But if files is around 4 GB, the speed is dropping in 10 Seconds…
user387694
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SCSI disks capped at 40 MB/s

I have a batch of SCSI disks and a controller; the drives are HP 72,8GB 10k RPM Ultra320 SCSI (model number BD07296B44), the controller is an Adaptec AIC-7892A U160/m, the issue is that I can't get more than 40 MB/s out of any of…
user186340
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Hot Swap Ultra320 SCSI LTO-Tape Drive

Can an Ultra320 SCSI LTO tape drive (or any SCSI device) be hot swapped without needing to power down the system? The current LTO tape drive is the only device on the SCSI host. If the above can be done, then what problem(s) could I run into when…
U85
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HP Ultrium 1840 LTO-4 slow write speeds

I have an HP StorageWorks Ultrium 1840 LTO-4 external tape drive attached to a machine running Ubuntu 18.04.4 LTS (kernel 4.15.0-99-generic) using an LSI20320IE PCI-X x4 SCSI adaptor with a VHDCI to HD cable. Writing to the tape drive is slow and…
Richard
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command line utility for linux to decode SCSI CDB

I need to see commands which send to my scsi device. I enabled scsi debug in kernel and got CDB. It looks like this: 2a 00 00 a0 09 90 00 00 08 00. I'm searching for command line utility to decode them in human-readable format. So far I found one…
George Shuklin
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How to enable space reclamation from KVM guest to ZFS zvol iSCSI target?

I have a ZFS volume "tank/kvm/webhosting", exposed through iSCSI (using tgt) to KVM guest.
Xdg
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Choosing the right backup solution - SCSI vs SATA tape drives

I'm backing up about 100gb worth of data on backup exec and after much deliberation, have decided that tapes are worth another shot (after my ultrium decided to die and munch tapes). Bearing in mind that my SCSI controller might be on its way out,…
atomicharri
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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 software running on Windows server 2008 is writing data…
matejk
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Hardware mods: kludging a conversion from U320 SCSI to SAS/SATA

I apologise if this isn't an appropriate question for this forum. I've an elderly server that works well and that I'd therefore prefer not to scrap entirely. But I would like to replace the current U320 drives with SAS/SATA drives as the old ones…
MMacD
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Can I rely on scsi host numbers to always stay the same?

I want to detect whether a disk is attached to the correct sata-port. While lsscsi gives me some useful information about the used host, I was wondering whether the SCSI host number will always stay the same: [0:0:0:0] disk ATA 2.5" SATA…
Bjoern Petri
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San lun wwid number 3 in front

I have a san lun in a linux server, using this following command I saw this: scsi_id -g -u -s /block/sda 38001438005dea3760000700002660000 #3 number in front of wwid sg_inq -p 0x83 /dev/sda | grep "\[" …
c4f4t0r
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Ultrium 3 tape drive shoe-shining, 3Mb/s: and it's not the cable

I have a HP 960 Ultrium 3 tape drive. Since I got it, (second hand, £90) I've been experiencing shoe-shining. Writing with tar in Linux, I average about 3Mb/s write speed. I've tried replacing both the SCSI card and the cable now, both of which made…
mowsala
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Why is a single drive much faster than 4 of them in RAID5?

I have a 2005 vintage server (dual 3GHz Xeons, LSI53C1030T RAID/SCSI controller with 256MB cache, 8GB RAM) and I'm re-purposing it for some light VM storage duty. First try to was to put 4x300GB drives into a hardware RAID5, and then install…
Marcin
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