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VMFS File System Recovery

Part 1 – Part 2 – Part 3 – Part 4 VMFS File System Reconstruction (Part 4) In the last three installments we have taken an in depth look at the VMFS file system. As we have seen there are many different components that make up the file system where each component not only does […]

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VMFS File System Reconstruction (Part 3)

Part 1 – Part 2 – Part 3 – Part 4 In the last two sections we covered the coarser portions of the VMFS file system. First we looked at what a volume consists of and the best way to find a volume on a storage device where the file system has been corrupted or […]

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VMFS File System Reconstruction (Part 2)

Part 1 – Part 2 – Part 3 – Part 4 In the first installment of our explanation of rebuilding the VMFS file system from a damaged volume we covered some of the attributes of the volume on disk data structure. In addition to that we reviewed some tools and methods for finding the placement […]

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VMFS File System Reconstruction (Part 1)

Part 1 – Part 2 – Part 3 – Part 4 Recently DTI Data received a challenge in the form of a VMWare ESXi 5.1 server which contained 16 (sixteen) 2 (two) terabyte Seagate ST2000DM001 hard drives. These drives were configured as a RAID 10, 8 (eight) drives for each side of a RAID 0 […]

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File Data Recovery Step by Step

File Data Recovery Guide Problem: A file that you now need has been deleted from your hard drive data on the C drive. Solution: Shut down the computer. It is important not to run the machine anymore. Windows works under the idea that areas of the harddrive that have been used before are used first. […]

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Unable to Rebuild a RAID 5 Array

RAID Configuration: 4 Seagate Barracuda Green 2 TB SATA hard drives (model ST2000DL003) configured as a RAID 5 connected to an on-board Intel RAID controller. Problem with RAID: Because of the nature of Green drives, specifically that they will spin down in low use periods, the array will periodically have a disk report as offline. […]

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SAN Data Recovery – iSCSI RAID 6 Issue

Serial attached SCSI devices have been a high speed blessing to the SAN, NAS, and Enterprise Storage Array class of systems. These devices offer a clear solution for any storage requirement due to capacity and configuration. Whether it is Fiber Channel mounted VMware or iSCSI configured raw data access these devices are undoubtedly a smart […]

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NTFS Master File Table Fixup

Recently DTI Data received an interesting question about the values stored in the Master File Table. The question referenced the value following the magic value of ‘FILE’ in the record. Some of the time the data is an asterisk ‘*’ and other time the data is a zero ‘0’. The person asking the question thought […]

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Toshiba Recovery – Crashed Hard Drive

Common Toshiba Hard Drive Failures All mechanical devices will fail sooner or later. Hard drives fail for various reasons. We will describe what we find to be the most common cause of failure with Toshiba hard drives. In the last decade, the most common failure we have encountered with a Toshiba hard disk has been […]

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Lost File System Recovered

The Mysterious Case of the Missing File System Sometimes there is just no way to ascertain the events leading up to the loss of an entire file system index. The client may have no idea what happened. When looking at the file system as a whole there are no telltale markers left behind. So the […]

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