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How to limit the number of blocks written or read in a Write_10 or Read command on Linux?

Here is the problem: My usb storage device has a 64kB (limited by hardware) buffer used to cache reads/writes which means it can only cache up to 128 blocks(512B) of memory. The SCSI Write-10 command ...
user26314708's user avatar
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Clear SCSI Log Pages

I am using a couple SAS SSDs. A while ago I started a "background long test" on one of them, unfortunately there was a blackout and the test was therefore interrupted. After the power was ...
T. Pluess's user avatar
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Naming of SAS block devices under /dev/disk/by-id?

When one uses SATA SSDs or HDDs under Linux, they can be addressed in numerous ways, like for example: /dev/sda /dev/disk/by-id/ata-TOSHIBA_MG05ACA800E_78LBK8P7FUUD /dev/disk/by-id/wwn-...
T. Pluess's user avatar
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systemtap script to simulate the IO error failed

I was trying to simulate the read/write error on specific sectors of the volumes by using the following systemtap script global error_sector_start global error_sector_end global error_major ...
lei wang's user avatar
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What is the purpose of the symbolic device file named with the HCTL address in the bsg folder

"/dev/bsg – This folder is for Block Scsi Generic drivers." I'm not sure what that means. There are two symbolic device files named with HCTL addresses in that folder, but from what is ...
xnl2d's user avatar
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iSCSI LIO target - how to resize lun?

What are the steps to resize a lun which is currently attached to an initiator? I mostly interested to know how to do that for file-based luns.
Jiri B's user avatar
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1 answer
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sg_format Low Level Format Interrupted - Kernel Errors

I was going through a sg_format low-level format from 520-byte to 4096 native byte sectors - during the process, the system lost power and the server went down hard. Now in the the kernel, I'm getting ...
tkrn's user avatar
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scsi timing out command, waited 300 seconds

I am booting rescue system on a server, which has defective HDD or controller. The kernel boot process times out with following messages: scsi timing out command, waited 300 seconds eventually it ...
Martin Vegter's user avatar
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141 views

Gparted enable more logging

I cannot find a way for Gparted to produce more informative logs in the manual. What I am looking for is to find out why exactly did e cartain I/O operation fail (more details about the SCSI command ...
Łukasz Przeniosło's user avatar
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790 views

How to find the SCSI ID of a disk in QTS?

Normally, in Linux, one can use lsscsi to map disk devices to their SCSI ID: # lsscsi -d [N:0:4:1] disk SAMSUNG MZVLB1T0HBLR-000L7__1 /dev/nvme0n1 [259:0] [N:1:5:1] disk ...
j4nd3r53n's user avatar
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No way to pass to virtual machine this old scsi controller?

I have sucessfully passed to vm pci-e and pci pure devices. I want to pass a scsi controller to a vm the controller is seen by the os 06:06.0 SCSI storage controller [0100]: BusLogic BT-946C (BA80C30) ...
elbarna's user avatar
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1 answer
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Is my SCSI controller faulty?

I have connected an old pci buslogic SCSI (i need for retrocomputing experiment) lspci said 06:06.0 Non-VGA unclassified device [0000]: BusLogic Device [104b:0150] No driver loaded, no disk ...
elbarna's user avatar
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386 views

USB drive error SCSI cache

just recognized an unknown error, as i checked my actual log with journalctl -f. When i unmounted my Backup-USB-disk with unmount /path/to/disk and then pulled the cable out, a short noise occured ...
lukeflo's user avatar
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343 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 ...
Jiri B's user avatar
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2 answers
4k 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 ...
async await's user avatar
3 votes
2 answers
4k 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 ...
brainchild's user avatar
1 vote
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45 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 ...
Aaron Brick's user avatar
1 vote
1 answer
303 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 ...
Brian Thomas's user avatar
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1 answer
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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 ...
Walter Schrabmair's user avatar
1 vote
0 answers
82 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 ...
BalaKrishna's user avatar
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1 answer
260 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==&...
Mark K's user avatar
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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 : ...
Mark K's user avatar
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7 votes
1 answer
967 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 [...
James Youngman's user avatar
1 vote
2 answers
2k 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 /...
Astora's user avatar
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1 vote
0 answers
312 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 ...
Kevin Nakamoto's user avatar
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1 answer
507 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: ...
sebelk's user avatar
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1 vote
3 answers
981 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, ...
Ede's user avatar
  • 11
3 votes
2 answers
402 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 ...
Zod's user avatar
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1 vote
0 answers
129 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 ...
yael's user avatar
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1 vote
1 answer
442 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 ...
Balvansh Heerekar's user avatar
2 votes
1 answer
2k 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 ...
JustAn0therL0stTechnician's user avatar
2 votes
1 answer
892 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 ...
T. Zack Crawford's user avatar
2 votes
4 answers
2k 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 ...
Eduard Tibet's user avatar
0 votes
1 answer
172 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 ...
jl81's user avatar
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1 vote
0 answers
253 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. [...
ibre5041's user avatar
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0 votes
0 answers
209 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 ...
AstroFloyd's user avatar
1 vote
0 answers
3k 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/...
Mark's user avatar
  • 707
1 vote
0 answers
667 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/...
raring-coffee20's user avatar
0 votes
1 answer
83 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/...
root's user avatar
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3 votes
0 answers
100 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 ...
Reinstate Monica's user avatar
3 votes
1 answer
3k 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?
Mark's user avatar
  • 707
1 vote
0 answers
219 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 ...
miguel ramires's user avatar
3 votes
3 answers
2k 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 ...
chris01's user avatar
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1 vote
0 answers
187 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/...
LordTitiKaka's user avatar
0 votes
1 answer
342 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 ...
Ozbit's user avatar
  • 429
5 votes
0 answers
2k 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, ...
Rob Farrell's user avatar
1 vote
1 answer
540 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-...
Ozbit's user avatar
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1 vote
0 answers
199 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 ...
user2934303's user avatar
0 votes
1 answer
544 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 ...
Dylan Cali's user avatar
1 vote
1 answer
162 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 ...
johan's user avatar
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