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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SCSI interfaces - originally used to attach peripherals like disks, scanners and tape drives - have mostly been superseded by and .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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Illegal Request error with unmap on vmware

I have enabled unmap feature on vSAN and then I powered off / powered on all VMs to enable unmap as described in the KB…
librhnylmz
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Scsi Path is failing

I am very new to multipathing concept. I am trying to troubleshoot an issue with multipathing however, I am not sure if it's an issue with multipath configuration. Server is connected to storage over iscsi, there are 4 different Ethernet ports which…
Rahul
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Are there any ultra 320 scsi hba that have Windows Server 2016 compatible drivers?

We've been using Adaptec 29320LPE cards but the latest compatible OS is 2008. We have this card running in a 2016 box in-house and it works fine. The issue is we need to update a client and I'm hesitant to put in a card that is not supported for…
Fro
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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 recognizes the Adaptec 2120S SCSI controller no…
NormAtHome
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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 attempted to enable write caching but I don't have…
AkBKukU
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PowerEdge 6650 disk issues

Here's a weird one I've been fighting for a while. I've got a old out-of-warranty Dell PowerEdge 6650 server with a PERC 3/DC RAID controller controlling four newer (maybe a year old) Fujitsu 136GB U320 SCSI disks in a RAID5 array. Maybe once a…
brian
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"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 output shows that my device /dev/sda supports…
SamTh3D3v
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Why are SCSI drives sized so strangely?

I've always seen SCSI drives sized for an uneven capacity like 36.7, 73.4, or 146.8 GB, but SATA drives always have even capacities like 80, 120, or 250 GB. Why the disparity? Is there some technical aspect of the SCSI interface that makes those…
Nic
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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 virtual on the same hardware, so it is not…
Xavi Montero
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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's Add button is disabled. So i only can add SCSI…
BAD_SEED
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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 --name $drive ;…
Christian
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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@softiwarp-1 ~]#…
basin
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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 almost seems like my VMs are missing a SCSI driver…
sirstancake
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SCSI drives not showing up in Linux CentOS 4

So I have a poweredge 6650 with Perc 3 installed. on the first channel of raid controller I have 2x 73gb configured in raid 1. On the second channel I have two 300GB drives that are stand alone. The two 300gb drives do not show up in linux, (no…
Mohammad
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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 and I have no Idea why or how to get them back…
Christian
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