Fibre-channel is a communications protocol widely used in storage networks. It's most widely deployed in enterprise SAN environments, where large amounts of storage need to be shared amongst a number of different hosts, potentially over longer distances. The protocol is primarily used over fibre ...

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213 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 ...
1
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1answer
178 views

What is the maximum number of FC switches in a switched star-topology fabric with a 4-domain fabric license on the hub switch?

I have 2 blade chassis, with 2 built-in fibre-channel switches each. And I inherited a "budget" fibre-channel switch with a 4-domain fabric license. I need a reality check, please: When I connect ...
2
votes
2answers
2k views

Emulex FC HBA not resetting

A Solaris 11 machine with an oldish Emulex HBA seems to have some problems: # dmesg | egrep emlxs Dec 29 15:31:10 san2 emlxs: [ID 349649 kern.info] [ 5.0608]emlxs1: NOTICE: 730: Link reset. ...
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2answers
742 views

diagnose dell poweredge r210 II not booting with qlogic hba

Dell doesn't "officially" support QLogic HBAs in their cheaper servers like R210 or R310. They support it with R410 upwards. But "official support" is a dubious concept anyway, at least for real men ...
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2answers
79 views

What SFPs can be used with Dell MD36x0f storage?

I've not found any information about used SFPs and supported cable length (which is what I actually want to know). Online configuration wizard does not allow to choose SFP type, only quantity. One ...
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1answer
153 views

Fiber-optic communication: Link length [closed]

I am trying to understand fiber optic communication over long distances: Can optical fibre communication links be used for a length of 100km as well as 100000km without having to change sender and ...
0
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2answers
2k views

MultiPath configuration on RHEL5 and Clariion CX-300

I have problem with discovering my FC-connected CX-300 storage. Frankly speaking I'm complete novice in FibreChannel, so step by step explanation would be appreciated. My configuration consist of two ...
2
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3answers
370 views

Is it possible to multipath across FC and iSCSI?

Perhaps a silly question this one, but I was wondering if it were possible to multipath a storage array across a FC connection and an iSCSI connection? Given that the main point of multipathing seems ...
1
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0answers
631 views

“Disk volume is write-protected” error when formatting

I have an Infortrend EonStor A16F-G2430 RAID-6 connected to Windows Server 2008 R2 x64 machine via Fiber Channel QLogic 2Gb PCI-X adapter. I am able to initialize the 8.5TB storage as GPT, and able ...
1
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1answer
289 views

EMC-branded DS24-M2 McData: Where get and what firmware?

I (will) get a EMC Symmetrix DS24-M2 FC Switch which is a branded McData 4500. I'm unsure how/if it's possible to update the box to the latest firmware without an official service contract anymore. ...
1
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3answers
211 views

Can't set up FC HBA with DHCP

I've got IP over FC working, and have the HBA (QLogic QLA2340) connected to a router with a DHCP server on it. However, whenever I do a: ifconfig fcip0 dhcp start I get: ifconfig: fcip0 wait timed ...
2
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2answers
173 views

Reset/reuse linux device letters?

Is there a way to tell the OS that /dev/sdd is really gone when I disconnect it and that it can reuse that letter? I have RAIDs hooked up through fibre channel. I have it set up so that fstab will ...
4
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2answers
2k views

How do I set up IP over FC?

I have 2 systems, with a Broadcom BCM5701 and a LSI7202p, of which are connected with a LC->SC cable. The cards are properly detected in Linux, however I wish to set up IP over FC. I've read online ...
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1answer
174 views

why are FC drives so cheap? or Using Fibre Channel drives as internal storage RAID array [closed]

While looking on Google Product search for drives for a new file server, I noticed that that almost all of the cheapest 300GB 10k drives are Fibre Channel drives: Google Products search result page. ...
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2answers
179 views

How to benchmark a fiber storage structure

We have an VMware structure, that uses a couple of physical hosts, a blade chassis and two SAN storages (a Fujitsu DX90 and a Fujitsu Fibrecat SX88). The two physical hosts have most of the LUNs on ...
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2answers
3k views

How to connect an HP StorageWorks 8000 EVA via Fibre to a Windows Server machine for direct storage?

I have two used HP EVA 8000 AD524B drive enclosures with 14 146gb drives in each. They have 2 Fibre controllers in each. I would like to connect these two units to an HP Proliant DL380 G4 server ...
6
votes
2answers
839 views

Is 10Gbps fiber (aqua or teal clad) backwards compatible with 4Gbps/8Gbps (normally orange clad fiber) FC equipment?

Just like the subject says. I've got a mess of FC hardware in a rack that I'd like to replace the cabling on. Looking at Monoprice I see that LC/LC cables are really close in price between 10Gb and ...
3
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1answer
742 views

ESX shut down VMs when some but not all storage paths failed

I've been on hold now for an hour waiting for VMware support and am betting serverfault can beat them to the answer! I am running ESX 4.0 and 4.1 on 6 HP blades, using FibreChannel LUN storage. We ...
1
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1answer
173 views

Help identifying and getting started with this Fibre Channel equipment

Some old(?) fiber channel equipment is being donated to my company and I need help identifying what exactly I have, and how to get it up and running if possible. I have two HP rack units, each with ...
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1answer
1k views

what is the latency for an 8K transfer of Fibre Channel? (NFS vs FC) [closed]

I've heard it said that a 512byte data transfer over fibre channel is 10us so would an 8k (16x the data) take 160us? or is much of that 10us one time transmit overhead? I'm interested in comparing ...
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1answer
439 views

XServe Raid with Ubuntu 10.04 problems

I have an Apple XServe RAID connected via fibre channel to a Dell Poweredge R610. This server is mainly for hosting subversion repositories, and storing disk images. In the past 6 months or so we ...
0
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1answer
932 views

SAN I/O is horrible

I've been testing a SAN with fibre channel disks and I get 500MBPS Writes 200MBPS sequential reads and about 5MBPS randon reads / 1000 IOps max. Any idea why reads are so much slower? It is a 3PAR SAN ...
6
votes
2answers
364 views

Fibre channel zoning by port: bad idea?

I have a single FC switch here that has a bunch of servers hanging off of it. Currently it is zoned (as per my previous question, Fibre Channel zoning best practices) by WWN, one zone for each pair ...
0
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1answer
279 views

Convert EMC AX150 to iSCSI?

I've to an EMC AX150 SAN, with two FC controllers in it. And no existing FC infrastructure. Since the controller cards seem to be modular (you can get 1 or 2 of them), is it possible to obtain iSCSI ...
2
votes
2answers
906 views

How to set up an Infiniband SRP Target?

I want to set up a server as a SCSI Target. How good are the open source implementations? What is the tutorial one? How is performance and reliability? How dependent is the OS? How much is ...
0
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1answer
417 views

Brocade Fiber Channel switch backups

I am looking for a way to back up my Brocade FC switch configs (including zoning!). Does anyone have commands or automated methods that they use for this?
1
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1answer
582 views

Interpreting count of zero transmit credits

Our SAN consists of some Brocade 5100 FC-switches, three storage systems and a number of servers. The none of the switches are inter-connected (no inter-switch links). All servers, switches and ...
0
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3answers
3k views

Should I use the WWN or WWPN when zoning an FC switch?

I'm looking at zoning 2 FC switches which were not zoned when initially implemented for some reason. They are IBM/Brocade switches and I've found this page to be quite helpful. I'm just trying to ...
3
votes
1answer
769 views

COMSTAR and ZFS zvol giving bursty write pattern

I've just built a small NAS/SAN box and am doing some testing with it. Configuration is: 2GB RAM 2x Opteron 265s Iwill DK8N 5x500GB SATA drives (1 spare, rest mirrored) = 1TB usable space Emulex ...
0
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2answers
2k views

Solaris Fibre Channel target - Configure QLogic QLA2340

I'm currently trying to set up a small storage system as a fibre channel target. This is for testing, so I'm currently using Solaris (Nexenta) and a QLogic QLA2340 HBA. For some reason, the qlc and ...
3
votes
1answer
938 views

Fibre Channel zoning best practices

I'm hoping that this will be useful for more people than just me. Right now I've got a fibre channel switch, a NetApp filer, and some servers running Oracle. All of the servers can see the same LUNs ...
10
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1answer
674 views

Correct placement of devices on a Fibre Channel fabric

We're getting a pair of new 8Gb switches for our fibre channel fabric. This is a Good Thing since we're running out of ports in our primary datacenter, and it'll allow us to have at least one 8Gb ISL ...
2
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5answers
3k views

Building cheap SAN

Note: Some of you may ask, why not just use a cheap hardware solution. The solution is not so cheap in the country it has to be installed in, with as much as 100% import tax on high end ...
2
votes
3answers
2k views

ZFS, SAN's, HA, Possible?

I currently work for a company that has purchased a number of different SAN solutions (whatever was cheap at the time!) and i want to setup a HA ZFS file store over fiber channel. Basically I've ...
0
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1answer
353 views

How do I resolve an “Invalid Transaction” error saving a zone config in Brocade Web Tools?

When trying to save zoning changes in the Zone Administration tool in Brocade Web Tools, I get the status "Failed to commit changes to fabric" and the messages window shows: --- start of commit ...
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2answers
1k views

NetApp FAS270 head doesn't see disks

I have an FAS270C. For months, I've been running it in a split-head manner (that is, with each head serving data totally independently, and without any clustering even being enabled) in order to ...
3
votes
3answers
2k views

Which OS can work as a fiber-channel target?

Just for the research, which OS can work from the box or with some 3rd-party software as a fc-target? I know only the following: Solaris (currently only OpenSolaris+COMSTAR), Windows Storage Server. ...
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2answers
323 views

Restart Fibre channel controller after blade bootup IBM HS bladecentre

I have a remote system that needs to resume on startup. If the system is simply powered on then the blades boot before the SAN is online and then the only thing you can do is restart the systems. Is ...
4
votes
2answers
4k 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 ...
0
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1answer
275 views

configuring a Fibre Channel switch

(I'm asking this for a friend and I'm don't know most of this technical stuff, so I'm sorry in advance if I'm not clear enough to describe the problem) Where can i find any information about how ...
0
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2answers
293 views

SAN cache memory upgrade

We currently have an IBM DS4300 Dual Controller Fibre SAN. It is a good box, but getting pretty old. It came with 256MB of cache per controller. Recently we replaced the batteries in one of the ...
0
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2answers
1k views

2 Server FC SAN Configuration

I have 2 identical servers: -48GB Ram -8GigE NIC's -2FC NIC's -2x72GB RAID1 Hard Drives -Server 2008R2 Host I also Have a Fibre Channel SAN: -16x146GB RAID10 Hard Drives -2xDual-port FC Controllers ...
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2answers
904 views

Debian and Multipath IO problem

Basically the situation is, I have a box running Debian, the box internally has an Intel SCSI RAID controller which is controlling 2 hard drives in RAID1 mode which is where the OS is installed. ...
5
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2answers
176 views

Storage issue - 360 VMs unresponsive

We recently had a fibre channel storage issue (looks like it was a single bad cable) that affected all 360 VMs in 2 clusters attached to the same storage virtualisation device - IBM SVC 2145. The VMs ...
6
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1answer
1k views

fibre channel debian problem

I have a QLogic Fibre Channel card installed in a Debian box (Lenny), and after some tiffs with the firmware, I managed to get the operating system to recognize the card (DKMS driver, and the ...
2
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1answer
1k views

Best practices for adding 2nd FC switch to fabric on in-production environment?

I have a single Brocade Silkworm 200e switch in production right now. The corp exchange server and 3 ESX 3.5 hosts are connected to the clariion cx3 array through it. Port 0,1 are SPA0 and 1, and ...
2
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4answers
3k views

Using SAN Fiber Channel network for TCP/IP, possible?

I would like to know if it is possible to use the FC-switch (that is used for a SAN) also for TCP/IP traffic. We have servers (virtual machines) that must have a fast network for copying much data. ...
4
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2answers
1k views

What is Multipath I/O?

What exactly does "Multipath I/O" mean?
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1answer
2k views

QLogic FC HBA + IBM DS5100 on RHEL 5.4 LUNs not detected as SCSI disks

Hey Guys! I've got a brand new DS5100 SAN connected to multiple hosts (HS22 Blade in BladeCenter H) via two independent fabrics. Switch (Brocade 20p for BladeCenter) is zoned properly, ie every host ...
0
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1answer
923 views

Adding fibre channel PCI Express card to ESX Server

I'm currently running several ESX servers using an iSCSI SAN. I'm in the process of preparing one of my ESX servers for a preformance test using a fibre channel SAN. I have purchased a Qlogic ...