Disk Insertion error when logging in (Xsan mounting)

Question

Recently we rebuilt on of our users machine from scratch to get it up to snow leopard (SL). I installed the Xsan software 2.2 and had a coworker in assist in getting our Xsan mounted to this computer through the MDC. Before evening mounting the Xsan, I got about 8 to 12 "The disk you inserted was not readable by this computer." errors and it asked if I wanted to initialize, ignore, eject. Hitting initialize just takes me to disk utility and does nothing. It does list the Xserve and all its drives, etc. At first it did not mount the Xsan at all, but through some configuring I was able to get it to mount. I how ever am getting about 2 prompts with this same error (The disk you inserted was not readable by this computer.)
I've issued the DF command in terminal and it does not show any weird volume references or other volumes that are there but not mounting. Here is the results:
Filesystem 512-blocks Used Available Capacity Mounted on
/dev/disk0s2 624470624 238623832 385334792 39% /
devfs 228 228 0 100% /dev
map -hosts 0 0 0 100% /net
map auto_home 0 0 0 100% /home
map -fstab 0 0 0 100% /Network/Servers
/dev/disk6 35163013120 12861455936 22301557184 37% /Volumes/VideoSAN
//12.domainname.net/Home$ 8790237176 2280266896 6509970280 26% /Volumes/Home$
//12.domainname.net/Office$ 8790237176 2280266896 6509970280 26% /Volumes/Office$
//12.domainname.net/Public$ 8790237176 2280266896 6509970280 26% /Volumes/Public$
I also took a look on the local box in console and noticed in the log for this machine that it was trying to mkdir pretty consistently. Not sure if they are related or not. Here is a snapshot of that.
Jan 8 12:07:03 whitemanj-adc xsand[31]: mkdir '/Volumes/VideoSAN': File exists
Jan 8 12:07:33: --- last message repeated 1 time ---
Jan 8 12:07:33 whitemanj-adc xsand[31]: mkdir '/Volumes/VideoSAN': File exists
Jan 8 12:08:03: --- last message repeated 1 time ---
Jan 8 12:08:03 whitemanj-adc xsand[31]: mkdir '/Volumes/VideoSAN': File exists
Jan 8 12:08:33: --- last message repeated 1 time ---
Jan 8 12:08:33 whitemanj-adc xsand[31]: mkdir '/Volumes/VideoSAN': File exists
Jan 8 12:09:03: --- last message repeated 1 time ---
Jan 8 12:09:03 whitemanj-adc xsand[31]: mkdir '/Volumes/VideoSAN': File exists
Jan 8 12:09:33: --- last message repeated 1 time ---
Jan 8 12:09:33 whitemanj-adc xsand[31]: mkdir '/Volumes/VideoSAN': File exists
Jan 8 12:10:03: --- last message repeated 1 time ---
Jan 8 12:10:03 whitemanj-adc xsand[31]: mkdir '/Volumes/VideoSAN': File exists
Jan 8 12:10:33: --- last message repeated 1 time ---
Jan 8 12:10:33 whitemanj-adc xsand[31]: mkdir '/Volumes/VideoSAN': File exists
Jan 8 12:11:03: --- last message repeated 1 time ---
Jan 8 12:11:03 whitemanj-adc xsand[31]: mkdir '/Volumes/VideoSAN': File exists
Sorry for not more details. Its been a few days since I have been able to work on this issue, *how can I get rid of this error every time the user logs in?* Any help or insight would be awesome. Thanks.

Answer 1

This all had to do with the user folder permissions and how they were nested. Our Sharepoints had the user folders several levels down. On Windows machines, the user folders could be mounted, even if the user did not have permissions on the parent folders. It seems Macs need Read & Execute access all the way down the line.
So, to do that, I gave Read & Execute access per folder (not propagating to child folders), all the way down the nested string until I came to the directory that housed all the home folders. This seemed to solve the issue. I'm guessing the "Sync" error message had something to do with the fact that when authenticating to an Active Directory server and mounting a network home folder, the Active Directory plugin in Tiger needs to read from the sharepoint, all the way down to the location of the home folder.
Our nesting now looks like this:
Say the username is Fred and Students is our sharepoint.
Students -> Users -> 2009 -> Fred
(R&E) (R&E) (R&E) (R&W)
Each of the R&E permissions were applied individually to avoid prorogation using groups.