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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.

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SCSI3 persistent reservation when using MPIO

This question does not involve MS Cluster! We have 2 windows servers running on windows server 2012R2 we have a shared disk and a witness disk to implement a quorum behavior in the shared disk ...
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1answer
39 views

Attaching more than one Server to a Tape Library

We are running multiple Dell PowerEdge's and want to connect them to a Dell TL1000 Tape Library. For my understanding, what we need is HBA cards for each Server to get the SAS connection. I ran into ...
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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 ...
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67 views

Read data from a Ultra 320 SCSI hard drive?

I'm trying to help out my former employer (I haven't worked there in 8 years); they have an old server that has suddenly gone belly up and it appears that the motherboard is failing and no longer ...
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1answer
75 views

Centos 7 server isn't able to see fiber channel LUN SCSI devices

I have a Fiber channel connected via SCSI SAN that I am not able to see. I would like to be able to access these drives as if they were mounted. Perhaps the entire thing is I have no to little ...
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54 views

Simulate write delay to SCSI disk on Linux machine

I am testing my application and want to observe behavior when I get delay in SCSI disk write on a linux machine (Fedora). I want to control the delay to control the test. I am exploring FUSE as an ...
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2answers
52 views

How to determine disk connection type in Linux

So this might be an obvious question, but I am managing several servers over a network and I would like to be able to find out what type of connector each server is using (i.e. SATA, SCSI, IDE, etc...)...
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175 views

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 ...
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1answer
1k views

SAN: FC vs SAS vs iSCSI

I am currently preparing for an exam. I thought FC (Fibre Channel) was the transport protocol for SCSI and SAN. But now I read, that you have to decide if you want to use FC (SCSI), SAS or iSCSI in an ...
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75 views

qla2xxx driver version 10 (kernel 4.16) does not detect targets on boot

Hardware: IBM x240 Flex, QLogic QMI2672 (FC5172) HBA When using kernel 3.10.0-693 (CentOS 7.4 stock, qla2xxx version 8.07) booting is successful - targets on both FC ports are detected, multipathing ...
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117 views

LSI SCSI Card Slow With LTO4

In a Ubuntu system I have an LSI card with a 53C1030 controller and I'm getting write speeds to LTO4 tape at only 4MiBps. The drive should be capable of 120MBps. I have found a copy of lsiutil and ...
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1answer
32 views

Fiber tape changer missing on lsscsi

I'm configuring a server with Bacula to manipulate backups on a Dell TL4000 connected to the server via Fiber. During the configuration of the Bacula Director I've accessed the bconsole to see if the ...
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1answer
51 views

Slim ATAPI or Slim SATA to SCSI HD50

Is it at all possible to connect a Slim-ATAPI connector (CD-ROM drive) to SCSI HD50? I have an internal CD-ROM drive with a Slim-ATAPI connector, that I would like to connect to an older 50 pin SCSI ...
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1answer
194 views

Does SCSI HBA ata_piix or mptspi correspond to VM's virtual disk in VMware?

I have a Debian VM running on VMware where cat /sys/class/scsi_host/host?/proc_name returns the following output: ata_piix ata_piix mptspi I understand from this that the VM has three (virtual) SCSI ...
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2answers
695 views

VMWare ESXI 6.5 VM cannot boot with second HDD

I have a 6.5 VM running off a local datastore, no network involved except for the web UI, no vCenter, dead simple. With a single Virtual disk, all is fine. If I want a second virtual disk (another ....
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132 views

Pacemaker SCSI fence not following resource group

I set up a HA-ZFS cluster following the excellent description of Edmund White (see https://github.com/ewwhite/zfs-ha/wiki). There are two ZFS pools with different RAID Levels (actually one RAIDZ3 and ...
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1answer
1k views

Add a SCSI disk on Linux without rebooting

I added new disk to my running Linux virtual machine. Is it possible to add a SCSI/SATA device explicitly, or to re-scan an entire SCSI/SATA host bus without rebooting a running Linux?
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2answers
457 views

SATA disks being identified as SCSI

I have two identical servers with same hardware and cloned Linux OS. They both have Supermicro HBA AOC-S3008L. Yet one server identifies SATA disks as SCSI while the other one correctly identifies ...
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1answer
287 views

“UNMAP not supported” error on a device that supports UNMAP

I was playing with trim/unmap commands on a Samsung SSD (MZ7WD240 model). To check the unmap support on this device i ran the following command: hdparm -I /dev/sda | grep TRIM And as expected the ...
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1answer
40 views

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 ...
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1answer
293 views

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 ...
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1answer
82 views

RAID SCSI Hard Drive: 73GB vs 72.8GB

I know that this may be a stupid question to some but I don't often work with SCSI drives with what seems to be non-standardized sizes compared to SATA drives. I currently have a RAID1 of two drives ...
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0answers
178 views

Automount ATA/SCSI drives with systemd

I am attempting to automatically mount all ATA/SCSI drives on boot using systemd and udev without utilizing /etc/fstab. This is necessary because filesystems need to be mounted on directories named ...
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2answers
2k views

USB Mass Storage recognized, but SCSI block-device not showing up

The block-device of a USB mass storage does not show up in Ubuntu 16.04, while I positively can see it in Ubuntu 14.04. Question: How can I make it show up in Ubuntu 16.04? NOTES: Both machines are ...
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1answer
153 views

Add disk on running VM in hyperV

I have an Hyper-V VM (generation 1). The VM is running but I need to add a new disk (a .VHD image). I don't want to stop this machine and I would do this while it is still running, but IDE Controller'...
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1answer
158 views

cfgadm hangs when attempting to attach SCSI device

I'm trying to hot plug a EXB-8900 tape drive into Solaris 10 and having issues. Here's the process I follow. Please note this has worked: cfgadm -x insert_device c4 yes at the first prompt to ...
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1answer
60 views

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 ...
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1answer
841 views

How to make SCSI enclosure LEDs blink?

I have a SCSI enclosure (supermicro BPN-SAS-825TQ) residing on Ubuntu 16.04. Is there an sg_ses (or sg_senddiag or other) command I can send to the enclosure, that will make the Rear LEDs blink, even ...
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3answers
289 views

linux scsi physical topology

Is there any way to find the physical topology of a drive on the SCSI bus in linux? here's an example: >: for drive in $(find /dev/disk/by-path -name \*0|sort); do udevadm info --query=path --...
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36 views

Received legacy SPC-2 RESERVE/RELEASE while active SPC-3 registrations exist, returning RESERVATION_CONFLICT

I have 2 iSCSI fileio backstores. I try to Determine whether shared disks can be used as tiebreaker disks . For that I run on the iSCSI initiator a tool from IBM to release the reservation: [root@...
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1answer
557 views

SCSI virtual disks not showing up on RHEL 7.X KVM guests

For whatever reason I can't get my virtual disks to show up on any of my RHEL 7.X guests (libvirt + KVM). The XML is configured just like my other guests so I know it isn't an issue on that end. It ...
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0answers
388 views

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. <disk type='block' device='disk'> <driver name='qemu' type='raw' cache='none' io='native' ...
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1answer
274 views

Failing to mount SCSI from HP Modular Smart Array (MSA20)

I have acquired a HP dl360 g4p with a MSA20 Modular Smart Array. Currently I have Arch Linux installed on it since I had some issues with the graphics. But that is not why I am asking a question. ...
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660 views

FibreChannel-SAN SCSI-block-devices get lost

There are 3 LUNs on a FC-SAN I want to access using 2 HBAs (with two paths each. When the system is booted, everything seems fine, but after a while the sd*-devices from the second HBA disappeared ...
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1answer
196 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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1answer
53 views

SCSI to SATA conversion

I have Hitachi dk514c-38 drive, which is producing ticking sound. These drives not available anymore. Can I connect a SATA drive instead of this with some converter? I also want to know if these is ...
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0answers
960 views

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 ...
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2answers
106 views

80 pin SCSI Raid Controller to SATA SSD's on IBM e336

I have an Old IBM e336 1U Sever. Currently the only Hard drive in the system is a Ultra160 SCSI drive. This drive is old and making some noises indicating that its life is going to end soon. Though ...
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0answers
190 views

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 ...
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172 views

SCSI queue depth / command queue settings

I two servers with about 100 LUNs presented to each from an IBM V7000 (Storwize). Each LUN has 8 paths - 2 FC ports x 2 FC switches x 2 V7000 heads - so about 800 devices. Devices/paths are managed ...
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1answer
420 views

Recover Data from RAID 1 : Array failed

I have a HP Proliant ML150 server with a scsi raid controller installed. Two disks are configured in RAID 1. My problem is when i start my computer, in the beginning, a message appears that the array ...
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2answers
428 views

Extra storage space for HP Proliant DL380 G5

I have a HP Proliant DL380 G5, SAS Hard-disk no space left, I am planning to buy HP StorageWorks MSA20 Sata - thus, a total of 6TB area will be formed. I do not know how to do connection server with ...
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1answer
129 views

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 ...
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1answer
3k views

FreeBSD VMware and CAM status: SCSI Status Error

I'm running a FreeBSD 10.1-RELEASE-p19 on a VPS (VMware). My ISP is experience a rapid data growth, and these messages spontaneous started to show up in our logs a week ago. Sep 25 09:00:50 srv03 ...
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1answer
1k views

Log in to a single LUN of a target with iscsiadm (open-iscsi)?

Is it possible to connect to only a single LUN of an iscsi target when using iscsiadm? I have a target like "iqn.0000-00.iscsi.foo:bar" this target has 1000 LUN's. If I do iscsiadm -m node -l -T iqn....
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2answers
337 views

What kind of interface card do I need for a SCSI tape library?

I've recently come into possession of an Arcvault 24, a combination tape libary/LTO4 tape drive unit. It connects via a U320 SCSI link using HD68 wiring. The server that this library will be ...
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1answer
331 views

sas sense key data protect

I have several Hitachi Ultrastar SSD400M Model #HUSML4040ASS601. They had a block size of 520 and I was able to successfully format all but one of them using sg_utils' sg_format to 512. However, one ...
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1answer
2k views

rescan SCSI Disk Without Reboot

I installed/added 2 new disks on VMware. I executed this command and didn't detect any new disks: ls /sys/class/scsi_host/ | while read host ; do echo "- - -" > /sys/class/scsi_host/$host/scan ; ...
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1answer
147 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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84 views

Can't see other VHDs after detaching another. Azure Ubuntu VM

We have encountered high Disk IO on our Ubuntu 14.04 VM's running mongoDB. On Windows Azure. To solve this issue we have changed the VM size from A2 to A3 (to add the additional data discs) and ...