Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win


Server 2003 NTFS errors on SAN drives

Posted on 2010-09-16
Medium Priority
Last Modified: 2013-11-14
We have just installed a dothill SAN solution on our CC3 network. All worked well initually but now we keep getting NTFS errors in event viewer about the other drives that are located on the san stating that the drives are corrupt and unreadable. this has caused windows server 2003 explorer to crash and slow the server down it has also stopped the configured drive showing any of our user areas located on the mapped SAN drive  any ideas would be gratefully recieved
Question by:Dad-of-Mook
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
LVL 13

Expert Comment

by:George Sas
ID: 33689878
You could at first try to call the guys that sold you the SAN and ask them for support.
This seems to be a SAN related problem more than a windows. So maybe the hardware is simply defective.

Author Comment

ID: 33690114
Hi GeoSs, everything is coming back as normal on the SAN, the drives are showing as status is all ok etc. we have contected the SAN via ISCSI initiator and forced to use basic disks instead of dynamic because of the connection, would this be the cause?
LVL 56

Expert Comment

ID: 33690708
Check that you haven't presented a LUN to more than one server, that'll cause corruption pretty quickly unless you've got some clustering software.

Basic disks are best, nothing wrong there.

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.


Author Comment

ID: 33691946
HI Andy, could you elaborate on your answer, as the Luns are showing on both servers if fact the whole SAN is showing up in Disk management with each mapped lun showing as a volume. were are using ISCSI initiator to connect to the SAN.  What is clustering software sorry if i sound a bit thick but im picking up on someone elses work.
LVL 56

Accepted Solution

andyalder earned 1500 total points
ID: 33692123
Can't have the LUNs being seen by two servers, NTFS is not a shared filesystem unless you're using Hyper-V or Windows clustering.

What will happen is that one server will write something to the disk but delay writing everything at once as it can cache it in RAM; then the other server comes along, not know about what the other server has cached and write to the same area of disk which will result in corruption. This caching is easily demonstrated, turn off a disk when it's in use and you will get a "lost delayed write" error message.

What you have to do is go to the Dot Hill configuration and select which hosts are allowed to see what LUNs, it should be under something like "host mappings".

If you need two servers to access the same LUN as a pair of fileservers for example you can only do that with expensive software such as Quantum StorNext, or MS clustering but that's active/passive. Clustering software allows arbitrated access to a shared LUN, for example a two node MS cluster has one node active using the LUN and the other node passive ready to take over if the first node fails, the two server nodes talk to each other through a heartbeat network connection so they know the state of the other and avoid bith accessing the LUN at the same time.

Author Comment

ID: 33693199
Thanks for the quick rsponse Andy, this is making more sense now! currently the we have 2 Luns mapped on the san drive for our 2 servers user areas 900 pupils so split a-m n-z servers respectivly. so we have created the 2 luns on the SAN,  server 1 H: server2 H: when you go into disk management it shows both drives no matter what configuration has been set also asking to allocate the drive to the server. i will have a look at the drive maps and see if we can stop the servers from seeing all of the luns

Author Closing Comment

ID: 33796291
Thanks Andy whilst its was not the definitive answer it pointed me in the right direction. The Luns had been mapped to allow everyone read write access which meant its was showing on all servers. your answer pointed me to change the read write/access so only the Luns pointing to that server could be seen.  

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article provides a convenient collection of links to Microsoft provided Security Patches for operating systems that have reached their End of Life support cycle. Included operating systems covered by this article are Windows XP,  Windows Server…
Article by: evilrix
Looking for a way to avoid searching through large data sets for data that doesn't exist? A Bloom Filter might be what you need. This data structure is a probabilistic filter that allows you to avoid unnecessary searches when you know the data defin…
This video teaches viewers how to encrypt an external drive that requires a password to read and edit the drive. All tasks are done in Disk Utility. Plug in the external drive you wish to encrypt: Make sure all previous data on the drive has been …
This tutorial will walk an individual through the process of installing the necessary services and then configuring a Windows Server 2012 system as an iSCSI target. To install the necessary roles, go to Server Manager, and select Add Roles and Featu…
Suggested Courses

597 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question