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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SCSI interfaces - originally used to attach peripherals like disks, scanners and tape drives - have mostly been superseded by and .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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Understanding Linux SCSI queue depths

I'm experimenting with the effects of different SCSI queue depth values on a Dell server running CentOS Linux 5.4 (x86_64). The server has two QLogic QLE2560 FC HBAs connected via multipathing to a storage system. The storage system has allocated…
Troels Arvin
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How to check Unmap event in windows server 2012 R2?

We have created few volumes in storage array. Via Iscsi initiator those volume have been added into host machine which is Windows 2012 R2. For few volumes when we delete the contents ,the volume size is not reduced in the storage array side. But the…
Samselvaprabu
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How do I configure ZFS to panic on da (SCSI) disk failure?

Situation: two redundant FreeBSD machines using CARP to share a primary IP, running a frontend proxy (E.G. HAproxy or nginx) Primary machine experiences a loss of SCSI disk (E.G. disk failure, SAN storage failure, etc) and services fail (L7 timeouts…
Josh
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Boot issue with Debian Stretch 9.4 (amd64) on Dell R710

I'm hoping someone has seen this and can assist. This is more of an annoyance than a true issue. I have a Dell R710 stacked with Debian 9.4 (amd64). The physical unit has the following characteristics: 2x Xeon X5550 32GB RAM Perc 6/i RAID…
Dave G
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HP P812 attr_value_interface_phy_not_connected

We got an error on HP server with a HP Smart Array P812 and now 6 of the drives are missing. the error seems to be attr_value_interface_phy_not_connected (See pic) and I found no reference anywhere on the web for it. in status alerts windows it also…
Radu Herinean
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What causes SCSI command timeout over 30 seconds?

System description: CentOS 7. SuperMicro X9DRW-iF board. Latest BIOS (and SCU option ROM), using SCU option ROM. Four 300GB WD HDDs connected to the board's SCU. Six HDDs connected to the six individual SATA ports. Normal software running for our…
jqr
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Mirroring on external SCSI and iSCSI disks inside same volume group

On IBM P5 505 (maint level 5300-07) servers there is a concurently accessed external storage, which is connected using external Ultra320 SCSI port (DAS). External storage is detected as hdisk2 which belongs to volume group dbvg. Volume group dbvg…
baltasvejas
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Tape drive unusable on 14.04 ESXi VM

The problem I've got an Overland ArcVault connected to my system (actually a virtual machine, with the standalone SCSI card it's connected to in passthrough mode), but it seems like the named tape device nodes (something like /dev/st0 or /dev/nst0)…
Mikey T.K.
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Raid 5 on two scsi buses with different maximum speeds

I'm quite a noob, I'm trying to set up as a study machine an old HP ProLiant DL385 G1. I've configured a RAID 5 out of six SCSI 3.5" HDDs using: - Smart Array 6i controller; - (4 x SCSI Ultra320 36,4GB disks, 15K) AND (2 x SCSI Ultra3 36,4GB disks,…
anto
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Is there a version of mt for windows, or something similar?

First of all, I'm not sure if this is the best place to ask this question. I was torn between SF and SU, but I decided for SF when I saw that questions about tape drives are scarce in SU. I need to manage a tape drive from windows. I'm using mtx,…
raven
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Linux SCSI Scan - is it still echo "- - -" in Linux 3.2

I'm working with attaching new SCSI drives to a virtual host, and the current method in my team's work instructions is to rescan the SCSI bus with: echo "- - -" > /sys/class/scsi_host/host0/scan However, this was written a few years back, and we've…
Joe
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Ultra 320 SCSI termination

I want to connect an old 12-bay DataStor InfoStation (which is an external storage cabinet) to an LSI MegaRAID SCSI 320-2E host bus adapter and now wonder what bus termination guidelines to follow. The InfoStation has two HD68 ports but nowhere in…
Darmocle
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How do you remove attached FC LUNS from CentOS 6?

We have a Qlogic QLE2560 HBA running on a Centos 6 server. I am needing to remove the attached LUNS remotely. I do not have any software from qlogic installed on the device. Their are 2 LUNS attached to a P200 G3 SAN and I can not find anything…
Justin S
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How do I put back different SCSI hard drives into their original RAID arrays across different servers?

I have potentially a big mess in my hands: I received today a box with several hard drives that used to be connected to different servers each one of them using an unknown - at least as of right now- RAID configuration. Regretfully, these are not…
Edgar
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What are Linux SCSI command timeouts and is the default suited for software raid?

My understanding of SCSI timeouts is that any read, write, flush and other commands have a limited time to complete. If exceeded, the command is aborted and an error is reported to the upper layer. While waiting for the command to complete, any…
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