2
votes
0answers
51 views

Can I rely on scsi host numbers to always stay the same?

I want to detect whether a disk is attached to the correct sata-port. While lsscsi gives me some useful information about the used host, I was wondering whether the SCSI host number will always stay ...
-1
votes
1answer
48 views

San lun wwid number 3 in front

I have a san lun in a linux server, using this following command i saw this scsi_id -g -u -s /block/sda 38001438005dea3760000700002660000 #3 number in front of wwid sg_inq -p 0x83 /dev/sda | ...
2
votes
2answers
89 views

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 ...
2
votes
1answer
250 views

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 ...
1
vote
0answers
58 views

SAS/SCSI Errors in Syslog: Kernel FAILED

I have a Dell 2950 2U rackmount server with 3 146GB SAS drives in a RAID array, running Slackware 10.2 (an old version, I know). Recently I am seeing these errors in my /var/log/syslog repeating very ...
0
votes
1answer
7k views

What does “- - -” in 'echo “- - -” > /sys/class/scsi_host/host0/scan' mean?

I know the linux command echo "- - -" > /sys/class/scsi_host/host0/scan is used to rescan scsi host. But what does "- - -" mean in the command?
0
votes
1answer
147 views

Forcing a SCSI HDD to rewrite a damaged sector

For a SATA/PATA HDD, this would be the normal procedure: http://www.sjvs.nl/?p=12 But a customer of mine has an old server with actual SCSI drives. I have tried re-writing the sector with dd to no ...
-1
votes
2answers
235 views

server not working smoothly [closed]

Hi I am getting this error message in log. Please suggest something to fix this issue Sep 6 06:19:17 sa1 kernel: sd 0:0:0:0: SCSI error: return code = 0x08000002 Sep 6 06:19:17 sa1 kernel: sda: ...
3
votes
1answer
1k views

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. ...
-4
votes
1answer
221 views

I still don't understand FC HBAs and such things [closed]

There is NO documentation out there. The companies don't offer any help on their products, and there aren't text books or anything. I want to set up a storage link between my desktop and my file ...
4
votes
3answers
402 views

Hot Swap Ultra320 SCSI LTO-Tape Drive

Can an Ultra320 SCSI LTO tape drive (or any SCSI device) be hot swapped without needing to power down the system? The current LTO tape drive is the only device on the SCSI host. If the above can ...
0
votes
0answers
530 views

SOLVED - Linux does not seem to see adaptec SCSI DAS volumes

Having a vtrak m310p unit, connected to a adaptec AIC79XX on a modern debian Squeeze. On the Promise DAS, I've tried to create arrays and volumes of many sizes, but during boot the scan of the id's ...
0
votes
1answer
418 views

Disable SCSI device auto detect

i am having trouble using SCSI device on Linux. In fact, i don't want that they can be detected until I use the following command : echo "0 0 0" > /sys/class/scsi_host/hostX/scan By detected ...
3
votes
2answers
936 views

Linux Rhel5.6 : SCSI protocol version — where is it defined?

In our environment, we have several storages cabinets connected to RH Linux servers. Depending on the storage cabinet connected to the host, some LUNs are seen using SCSI protocol version 2 ...
3
votes
1answer
943 views

Why is a single drive much faster than 4 of them in RAID5?

I have a 2005 vintage server (dual 3GHz Xeons, LSI53C1030T RAID/SCSI controller with 256MB cache, 8GB RAM) and I'm re-purposing it for some light VM storage duty. First try to was to put 4x300GB ...
18
votes
8answers
16k views

Disk full, du tells different. How to further investigate?

I have a SCSI disk in a server (hardware Raid 1), 32G, ext3 filesytem. df tells me that the disk is 100% full. If I delete 1G this is correctly shown. However, if I run a du -h -x / then du tells me ...
0
votes
2answers
1k views

RHEL/CentOS reassign scsi device letter

if I remove the physical disk associated with /dev/sdb and add a new disk in the same slot, it will be assigned /dev/sdc (or whatever the next available letter is). Is there any way powered on that I ...
0
votes
1answer
42 views

Storage subsystem borking after server restart (all on a Parallel SCSI bus)

I have a server (with a SCSI HBA) connected to two Promise VTrak M310p RAID enclosure on the same bus. Everything is working fine until I have to restart my server. Once restarted, the server can no ...
1
vote
2answers
2k views

Where is /proc/scsi/scsi in Debian 6?

I recently installed Debian 6 in a VM on ESXi 4.1, but I noticed there is no /proc/scsi/scsi. Am I missing a module which provides that, or is there a different way of doing things like echo "scsi ...
6
votes
3answers
6k views

How does Linux determine the SCSI address of a disk?

Greetings, I'm working with RHEL 5.5 guest VMs under VMware ESX 4. When I configure the virtual disks in the VM hardware settings, each disk has a SCSI address in the format "N:M". For example, "1:3" ...
1
vote
1answer
521 views

In Debian (>= 5.0 lenny) how to set scsi_mod's max_luns option?

The scsi_mod has this option max_luns which is the "last scsi LUN". How can I view the current setting and change it?
0
votes
1answer
274 views

linux need to discover local sata mirror before hba attached scsi

(none of the machines mentioned are in production) Hello, I'm trying to install Centos 5.4, which wants to put the boot loader on either the boot sector of the boot drive (a local SATA mirror, ...
4
votes
2answers
5k views

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 ...
1
vote
2answers
458 views

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 ...
0
votes
4answers
4k views

Linux machine can't find its tape drive

I have an older HP NetServer LPr with what is apparently a Symbios SCSI card connecting to a Quantum SuperLoader 3 that is DLT based. From time to time, we seem to lose the connection to the ...