Questions tagged [scsi]
The scsi tag has no usage guidance.
131
questions
2
votes
0
answers
63
views
How to blacklist some scsi devices via a kernel parameter?
I need to tell kernel to completely ignore some SCSI devices (eg. from vendor 'PURE'). I see libata.force=x.yy:disable can be used for individual SATA devices, but I need something equivalent for SCSI ...
- 456
0
votes
0
answers
29
views
How to stop (prevent) scsi kthreads (from) handling some SATA ports
My motherboard gets 6 AHCI ports 1, 3 of them being connected (permanently) to SATA disks.
Because I would like to use the free ports for other purposes (than connecting SCSI compatible devices), I ...
- 2,850
0
votes
1
answer
104
views
LVM VG/LV is not activated at system startup
I have two multipath devices configured
mpathb (36005076300808b3e9000000000000007) dm-1 IBM,2145
size=16T features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
|-+- policy='service-time 0' prio=50 ...
0
votes
1
answer
162
views
linux scsi: Unit Not Ready, Sense Key, Hardware Error
I have attached a USB device which is an enclosure for an NVMe M.2 storage unit. Both devices, the enclosure and the media, had been known to be in working order during their last use.
When I connect ...
- 172
1
vote
0
answers
29
views
Optical drive suffering from chronic premature ejection
My slot-loading optical drive (HP BDDVDRW CA21N) spins and up and then ejects every disc, a process that takes about 15 seconds. I've found lots of posts on enabling wanted ejects, but close to ...
- 401
0
votes
0
answers
60
views
Medium Format Corrupted on SSD after SAS failure
Recently some of the servers we use have failed, leading to Sense Key: MEDIUM FORMAT CORRUPTED of the SSD's. The SAS card being used is the HighPoint RR2711.
The SAS card is still functional after a ...
0
votes
0
answers
76
views
How do I set up a JBOD device on Ubuntu using a SAS card
I am running Ubuntu 20.04 LTS server. I have installed a SAS PCI card I purchased from Amazon.
The card is active and detected (lspci shows the device).
I have installed the appropriate drivers from ...
- 101
1
vote
1
answer
94
views
sas drive i/o error 5 via raid card - sed locked partition table
I am trying to find a better way to access my newly purchased SAS drives (deepdiscountserver 3tb IBM platters(used or refurb i think yes)), using a 2x4 LSI PCIe3 card. I think the card is only half ...
- 688
0
votes
1
answer
136
views
How to check if LSI20320IE is working without LTO TAPE in Ubuntu 20.04 LTS
I have done a lspci -vv to check if my Driver for the LSI20320IE SCSI Controller ( Data-Sheet ) is correct installed. (The LSI-drivers are from here MPTLINUX_RHEL4_SLES9_PH14-3.13.04.00-2.zip and I ...
0
votes
0
answers
22
views
Mount scsi media changer as standard disk
I want to know if it is possible to mount a LTO tape changer/drive as a standard disk, so that when a file that exists on any of the tapes is requested, the media changer will load the appropriate ...
1
vote
0
answers
15
views
Unable to get scsi device path (st) device path for IBM LTO7 drives
when we execute the lsscsi -g |grep -i ult command we get list of all LTO7 drives of IBM company.
here we are able to see the st path for the drives.
no scsi id's generated for lto7 drives.
its ...
- 11
0
votes
1
answer
47
views
Why the subsystem of a SATA device is scsi?
By doing udevadm info -a /dev/sda
we can see something like:
looking at parent device '/devices/pci0000:3d/0000:3d:02.0/0000:60:00.0/host6/port-6:0/end_device-6:0/target6:0:0/6:0:0:0':
KERNELS==&...
- 391
1
vote
1
answer
328
views
How the h c t l numbers read from in lsscsi?
When doing lsscsi:
$lsscsi
[0:0:2:0] disk FUJITSU MAM3184MP 0105 /dev/sda
[1:0:0:0] cd CREATIVE CD5233E 1.00 /dev/scd0
In my understanding:
H : SCSI host id
C : SCSI channel
T : Target Number
L : ...
- 391
7
votes
1
answer
590
views
Tape readable with scsitape but not dd or tar, why?
I just installed an Exabyte tape drive:
$ lsscsi -g
[11:0:0:0] process Marvell 91xx Config 1.01 - /dev/sg0
[12:0:1:0] cd/dvd TOSHIBA CD-ROM XM-3401TA 0283 /dev/sr0 /dev/sg1
[...
- 1,123
1
vote
1
answer
153
views
add new disk in /etc/tgt/targets.conf and reload without affect other disks/initiator hosts
I have added a new disk to the server:
[root@ns1 tgt]# lsblk |grep sdh
sdh 8:112 0 600M 0 disk
Also, I have created a new entry for /dev/sdh in /etc/tgt/targets.conf
[root@ns1 tgt]# cat /...
- 369
1
vote
0
answers
84
views
Monitoring the activity of tape drive with SCSI generic driver (sg)
I would like to monitor statistics (transfer rate, byte/sec) for each LTO tape drive connected to Linux system. I understand that tapestat command can exactly do this, but this shows the activity of ...
- 136
0
votes
1
answer
69
views
What does mean host in lsscsi command?
A notebook has only one SSD (without CDROM drive)
if I take a look at /proc/scsi/scsi it outpus:
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: ATA Model: KINGSTON SUV500M Rev: 56RI
Type: ...
- 3,969
1
vote
2
answers
256
views
dmesg shows 0 512-byte logical blocks
Last week I unfortunatly dropped by external HDD drive and it wouldn't spin up anymore. I got other backups, so I thoughed I opened it up so see whats wrong. The read/write head was stuck and damaged, ...
- 11
2
votes
2
answers
147
views
Parallel SCSI target mode - how to make Linux/BSD behave like a hard drive?
I use many old parallel SCSI(-1/-2) devices (many "Fast SCSI-2", 10MB/s, 8 bit wide), which I want to attach to a modern computer via a classic Adaptec PCI SCSI host adapter in "target ...
- 21
1
vote
0
answers
86
views
Linux + how to simulate JBOD disks that are out of service in shelf
We have Kafka machines installed with RHEL 7.2 servers on Dell HW and a shelf includes 15 disks.
We want to understand what happens when we push out one of the Kafka disks, and see if Kafka is still ...
- 11.1k
1
vote
1
answer
182
views
QEMU virtio-scsi: Cannot see the number of queues after booting VM with virtio-scsi command
QEMU newbie here. I am trying to boot a VM using QEMU, for increased performance I am trying to use a virtio-scsi mounted drive. I am following the steps given here. However when I boot my VM and I ...
2
votes
1
answer
483
views
Testing LTO drive with mt and dd
Here are my commands
mt -f /dev/st0 rewind
dd if=/dev/st0 of=-
As I understand it the first command rewinds my tape in /dev/st0, and the second command writes contents of /dev/st0 to -. My questions ...
2
votes
1
answer
460
views
How do you determine the remaning capacity of a magnetic tape with mt or tar? How much space is in a block?
I am currently trying to back up data onto an LTO-4 tape using mt-st
and gnu tar 1.32, but I want to make sure I stop trying to copy things before the tape runs out! LTO-4 nominally has a capacity of ...
- 187
2
votes
4
answers
1k
views
SATA disk drive behind Adaptec RAID 5405 can't be detected as block device
Due to shortage of free built-in SATA 3.0 plugs (6 totally) on my motherboard (Gigabyte 970A-DS3 rev.3) I've got an Adaptec RAID 5405 (3G SAS/SATA RAID) to move all "slow" SATA 1.0/2.0 ...
- 141
0
votes
1
answer
105
views
Can't see /proc/scsi/sg folder in the Yocto file system
I'm using a Yocto image on an iMX6 SoC ev-board and I would like to write a C code to access the USB storage device via sg driver.
Since I need to access the logical blocks of the storage directly ...
- 35
1
vote
0
answers
134
views
SCSI Host number persitence
I have two identical VM servers in VMware. I want to somehow distinguish assigned disk to these VMs (disks for LVM, for DB data, ...).
But for some reason H:C:T:L addresses on these hosts differ.
[...
- 131
0
votes
0
answers
95
views
Cannot suspend because cdrom_id and udevd are in uninterruptible sleep
I upgraded the Linux kernel on my Gentoo Linux system from 4.9.76 to 5.4.38 about two weeks ago. Since then, my dvd drive will stop spinning up when I insert a dvd and my laptop can no longer suspend ...
- 111
1
vote
0
answers
1k
views
FAILED Result: hostbyte=DID_SOFT_ERROR driverbyte=DRIVER_OK
What does it mean DID_SOFT_ERROR?
According to kernel source, it defined:
#define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */
https://github.com/torvalds/linux/blob/...
- 595
1
vote
0
answers
363
views
virsh attach-disk only work with name vd* instead of sd*
I have an qcow2 image and want to attach another disk to it.
# create new qcow2 disk
qemu-img create -f qcow2 vm-disk2 500G
Then I attach it as sdb:
virsh attach-disk myvm /var/lib/libvirt/images/...
- 1,655
0
votes
1
answer
36
views
scsi_host interconnects
Can you please explain storage interconnects with respect to Linux. What are exactly scsi_host0, host1, host2, etc. I recently checked on a VM that had around 39 hosts present in /sys/class/scsi_hosts/...
- 9
3
votes
0
answers
68
views
How does a block device driver handle IO errors
When a block device gets a request to read a range of sectors, and one of those sectors has a read failure, how does the driver signal to the kernel that a partial read is available, and that the ...
- 601
3
votes
1
answer
1k
views
sd 5:0:0:0: [sda] Attached SCSI disk, what are these four numbers? Will they change?
I can usually see this log in dmesg:
sd 5:0:0:0: [sda] Attached SCSI disk
Can you please explain what are these 4 numbers?
Will these numbers change after reboot? or it should be constant?
- 595
1
vote
0
answers
72
views
How to identify the disks of a Linux virtual machine in VMware vSphere 6
I have a virtualized RHEL7 server with vsphere 6, I need to remove some virtual disks from vCenter that are presented to my virtual machine (rhel server) that are no longer being used by the operating ...
3
votes
3
answers
942
views
SCSI: SAN or local disk?
I have a Debian 9 running.
It has a SSD connected as well as a fibrechannel link to a SAN storage.
As far I see both are visible as /dev/sdX devices.
How can I find out what is the disk and what is ...
- 489
1
vote
0
answers
139
views
how to make sure SCSI is properly freed
I have external SSD that I want to safely remove (as part of automation):
lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 89.3M 1 loop /snap/core/...
- 111
0
votes
1
answer
198
views
How to get host "client" initiator wwn's from FC SAN card & switch
I saw an IBM San Storage and at Host alias creation page they can show you available host (client) initiators wwn's to choose.
And I wonder how they can find client initiator wwn's from storage?
I ...
- 389
3
votes
0
answers
1k
views
USB SCSI drive recognized, but can't mount
This is a MyBook AV drive that was recording video from my fios box before I cut the cord. I'm trying to use it as a backup drive with a SCSI to USB cable. Ubuntu 18.04. Detected by lsusb and lsscsi, ...
- 31
1
vote
1
answer
352
views
Can I change LIO SCSI Disk Vendor name
I'm using LIO for SAN scsi.
The shared disks shown as LIO-ORG at client side.
Example;
[root@testing ~]# lsblk -S
NAME HCTL TYPE VENDOR MODEL REV TRAN
sdc 4:0:0:0 disk LIO-...
- 389
2
votes
0
answers
117
views
Does Linux has a fundamental limitation about using multiple cd/dvd drives simultaneously?
I have two cd/dvd drives in my laptop. One is an external USB drive and the other is the SATA drive that came with it.
And I can't burn two DVDs at the same time in both of them at full speed no ...
- 131
0
votes
1
answer
357
views
connected old scsi disk via IDE->USB adapter, recognized in syslog but not fdisk?
I have an old hard disk I'm trying to check for data and format before recycling/donating. I'm using an IDE to USB adapter to connect the disk to my linux laptop. In my syslog I see the following ...
- 267
1
vote
1
answer
110
views
How to terminate old IBM internal DDS-3 tape drive?
I'm having some difficulty getting an old DDS-3 tape reader working on my Linux workstation. Some details:
From the product code that is printed on the label (E30364) I managed to identify the tape ...
- 221
3
votes
0
answers
725
views
/sys/block/sd*/device/timeout not accurate
The default value for the timeout file for SCSI disks is 30, supposedly meaning 30s. In my dmesg logs, I find that the system is waiting 180s before timing out. Setting timeout to various values ...
- 601
0
votes
0
answers
246
views
Shrink LVM2 Thin Volume
I would like to shrink the space required by a thin volume used as a disk for a virtual machine (Windows). Unfortunately, the underlying disk is a USB-attached SSD and therefore mounting the NTFS ...
- 41
2
votes
2
answers
2k
views
What does Fedora Workstation 29 use as the default I/O scheduler?
If it depends on the exact type of block device, then what is the default I/O scheduler for each type of device?
Background information
Fedora 29 includes a Linux kernel from the 4.19 series. (...
- 44.5k
0
votes
1
answer
4k
views
Dealing with Device-Mapper (Multipath) Failing paths
When a disk starts to die slowly multipath starts to Failing & Reinstating paths and this keeps forever.. (I'm using LSI-3008HBA card with SAS-JBOD not FC-Network)
Dmesg;
Sep 13 11:20:17 DEV2 ...
- 389
0
votes
1
answer
107
views
How soon will linux notice that a disk has been detached ? And can it be quicker?
I found that if I detach a disk from my Linux server (CentOS 7), the related /dev/sd* file will disappear automatically about 10 seconds later.
I'm wondering how does Linux know a disk has been ...
- 111
1
vote
0
answers
41
views
Drive emulation at driver level
I would like to emulate a virtual SED at driver level. The goal is to develop/simulate the "firmware" of a drive, and map driver interface commands to an app which would handle interface specific ...
- 11
8
votes
1
answer
13k
views
how to tell which disk is sda and which is sdb disk?
from the df -k command, I see sda, sdb, sdc disks. They have some partitions (for example, sda has sda1, sda3). I want to detach sdb and sdc temporarily for OS upgrade. How exactly can I tell which ...
- 281
0
votes
1
answer
736
views
Why is `ioerr_cnt` rising, without showing any messages in the log?
$ cd /sys/devices/pci0000:00/0000:00:1f.2/ata2/host1/target1:0:0/1:0:0:0
$ ls -l driver subsystem
lrwxrwxrwx. 1 root root 0 Apr 5 10:48 driver -> ../../../../../../../bus/scsi/drivers/sd
...
- 44.5k
0
votes
0
answers
46
views
How to view pending SCSI requests?
If the PC sends a request to read a sector on an optical disc, which turns out to be unreadable, the drive deadlocks the program into responselessness and motionlessness, until it returns the sector ...
- 1,616