The original SNAP NAS devices were developed by SNAP Appliance. The operating system that was used was a flavor of BSD in concert with the file system UFS. Although the file system looks very similar to the original UFS there were some subtle … [Read more...]
Analyzing RAID parity
July 23, 2008 By
Last time I discussed how to find the RAID data offset for a SNAP OS 4.x RAID handler. To put it briefly it was just a simple matter of finding Cylinder Group zero on the first drive in the array and back tracking 48 sectors. Once the RAID data … [Read more...]
Finding SNAP OS 4.x RAID Data Offset
July 21, 2008 By
If you are in this business long enough you will see everything, or will you? Two weeks ago I received a SNAP RAID OS 4.x for recovery. I have done a lot of these and I am pretty familiar with the data offsets, how the drives are setup, and where … [Read more...]
SNAP RAID Recovery Part II Drive Set Definition
February 19, 2008 By
One of the many attributes of a RAID 5 that make it popular is that if a drive goes down in the array the RAID will remain functional. In such a case the following events should occur. An alarm should sound. An alarm that would wake the dead. … [Read more...]
SNAP Server Data Recovery 3 Spanned RAID 5 Arrays
February 8, 2008 By
Recently, it was my task to take sixteen drives, spanned across three RAID fives, and recover a set of hundreds of AVI files. These files were used for research and although not time sensitive, were critical to the conclusions of the … [Read more...]
SNAP Data Recovery Through The OS Inode
May 21, 2007 By
This week is the final offering of our topic Recovering a single file from a SNAP Server Operating System. We have learned what a Super Block is, a cylinder group, and some of the important data elements in those data structures. We have learned how … [Read more...]
SNAP OS Data Recovery Super Block
April 26, 2007 By
SNAP Operating System File Recovery Through The Super Block Recovering a single file from a SNAP OS Part 2 Last week we discussed how to find the file name on a SNAP OS file system. Using a sector editor we searched the hard disk drive for the … [Read more...]
SNAP Server Data Recovery Of A Single File
April 19, 2007 By
Recovering a single file from a SNAP OS As we know SNAP Appliance used a proprietary Unix File System (UFS) handler in order to run there Network Attached Storage (NAS) product. This particular OS ran a Berkley Software Distribution (BSD) flavor of … [Read more...]
SNAP RAID Recovery using SNAP OS
April 11, 2007 By
SNAP Server NAS RAID Data Recovery SNAP Appliance, now owned by Adaptec was one of the pioneers of the Network Attached Storage (NAS) technologies. Through the use of the Berkeley Software Distribution (BSD) and the UNIX File System (UFS), SNAP … [Read more...]