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Multipath Duplicate Drives

I am setting up multipaths for Veritas backup on SAN storage. I noticed that lsblk shows duplicate disks, which is quite confusing. For example, both sdc and sdd represent the same disk, and similarly,...
Zaheer Ahmad Khan's user avatar
1 vote
2 answers
1k views

Does a file system also use block storage?

I'm confused about the actual internal workings of a file system. The question is about file storage vs block storage. From what I understand, the difference is in the level at which we access data: ...
Aravind's user avatar
  • 111
1 vote
0 answers
121 views

Is it possible to mount an ATA over Ethernet (AOE) block device on multiple clients, if so how?

I have a lab consisting of 3 machines connected with 2 10gbe links on 2 segregated networks. Each device has 100tb in block storage connected to it. I want to use ATA over Ethernet to create a storage ...
Tim's user avatar
  • 111
0 votes
2 answers
950 views

procedure with multipath and lvm - migrating to new storage array

I have an older redhat (5) server that needs to have 9 array filesystems moved to a new array. I'm seeking some assistance on the best way of doing this and how the process works. The data is being ...
r.l.'s user avatar
  • 81
0 votes
1 answer
293 views

Is it possible to find amount of data that come and go through HBA ports?

I have a ProLiant server with a HBA card (2 ports). $ ls /sys/class/fc_host host2 host3 and also I have a 20T SAN storage that is connected to San switch via those ports. Is it possible to ...
BlackCrystal'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
  • 595
0 votes
1 answer
327 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
1 vote
1 answer
239 views

What does "no device" mean when running iostat -En

We presume to have a faulty cable that connects the SAN to a direct I/O LDOM. This is a snippet of the error when running iostat -En c5t60060E8007C50E000030C50E00001067d0 Soft Errors: 0 Hard ...
hovey's user avatar
  • 13
2 votes
1 answer
958 views

Viewing Port Info FC Solaris 11

I have a hba card with two ports (port 0) and (port 1) and I want to know how can obtaining using OS the info to mapping the wwn that I can see using fcinfo hba-port command to a port of the hba card. ...
vicdeveloper's user avatar
2 votes
1 answer
2k views

PVS output not showing drive

I had created physical volume earlier i.e. /backup, /ndasdb, /processor, /latro. Don't know what exactly happened, but /ndasdb is not showing in any of this output result: Pvdisplay, Vgdisplay, and ...
Himanshu Dua's user avatar
0 votes
1 answer
703 views

Oracle Linux 7 mounting SAN storage issue

I have a scenario where I am trying to mount SAN storage to my linux machine. My environment details are- Oracle VM manager for VM creation Fiber Channel HP3PAR SAN storage attached as physical disk ...
k10gaurav's user avatar
  • 101
2 votes
2 answers
1k views

List HBA information on Solaris 11 OS

Actually I want to know how can I see the Luns presented using a HBA WWN. The view that I want is something like this: LUN (on the server side like /dev/rdsk/...) | WWN (from the server) | Paths (...
vicdeveloper's user avatar
0 votes
1 answer
449 views

Oracle Linux 7.5 format a SAN storage disk using ext2 file system

I have a scenario where I have to use SAN storage for my Oracle Database installation single node production setup and need to keep Database configuration files on SAN. I am using Oracle VM manager to ...
k10gaurav's user avatar
  • 101
0 votes
1 answer
1k views

Mount storage from Fiber Channel SAN on Oracle Linux

I have a scenario where my shared storage is available at SAN (Storage Area Network). The SAN is available through Fiber Channel. I am installing some oracle product and want to use storage from SAN ...
k10gaurav's user avatar
  • 101
3 votes
3 answers
2k views

How come I, as a normal user, am able to change ownership of a file?

I have a partition that's NFS-mounted from a Netapp SAN. I can create files in that partition, and I can chown those files to another user, any user, even root. How am I able to do so? I thought the ...
Mike S's user avatar
  • 2,572
0 votes
0 answers
272 views

Migrating RHEL 6.x from Local Disk To SAN Disk

I am running RHEL 6.x in my production and booting from local disk which is actually RAID 1 configured from BIOS. (IBM Blade Center H) I wish to migrate this to SAN disk and perform SAN booting. This ...
Sagar's user avatar
  • 438
0 votes
1 answer
665 views

Get SAN Lun Names

My storage administrator assigned LUNS for a RHEL 5.10 Server. Now when I run /sbin/scsi_id -g -u -s /block/sdN, it shows: 360060160c8803500183327ae00a2e711 Now I want to see the exact name, just ...
OmiPenguin's user avatar
  • 4,328
0 votes
1 answer
2k views

Find LUN id for Hitachi stotage on Linux server

I'm able to find existing WWIDEMC LUN id by using INQ utility but for Hitachi it is not possible. Do you guys have any idea to find the LUN's. For Solaris and AIX I have no issues and the problem is ...
Athiri's user avatar
  • 679
2 votes
0 answers
71 views

Multipath -- Ignoring internal disks

I want to configure multipath such that it ignores all the internal disks and only sees SAN Luns. Any idea how can I achieve that? Basically I want to filter out all the internal disks like IDE, SAS ...
technewbie's user avatar
2 votes
0 answers
262 views

How to move LVM to new server

The current setup of my server, I have a storage disk array (RAID60) which hold 110TB of data. All the data is stored in multiple volumes created by LVM. Now, I want to upgrade my server with Cent OS ...
vishnupanati's user avatar
1 vote
2 answers
179 views

How is reliability achieved with SCSI and SAN?

I am pretty new to SCSI and actually not even sure if this is the correct forum to ask. (I did because I found some SCSI questions :) So please feel free to improve/migrate this question. I am ...
wlnirvana's user avatar
  • 255
0 votes
1 answer
344 views

Install CentOS 7 without any local disk?

If we only got disks from iSCSI (additionally multipath) and no local disks, how can we install a CentOS 7 on them?
pepite's user avatar
  • 1,123
0 votes
1 answer
4k views

failure at starting on postgresql

I installed a postgresql database on Redhat 7.1 and I decided to move the database on a ISCSI device (LUN) inside a logical volume, mounted at starting of the machine (xfs formatted). The mounting ...
magique's user avatar
0 votes
1 answer
120 views

Migrate to a new vdisk

I have to migrate some data to a new vdisk. But i have no idea how i can do this. The old Vdisk is under /dev/mapper/12345 which is a link to /dev/dm-1 The new Vdisk is under /dev/mapper/67890 which ...
Alex's user avatar
  • 1
0 votes
1 answer
129 views

Fiber channel card without san for testing

I have received a pci-x card HP A6795AX A6795-62001 2G/1Gbps 64bit Single Port PCI Fibre Channel is possible to test it without cable connect to san or san switch? Or i will get error messages?System ...
elbarna's user avatar
  • 12.8k