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Partition Loss In Windows Due To Lack Of Shutdown Notification

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In the context of servers we aspire for better disk and system software performance than workstations. There are various options to achieve that. One is by using hard disks with quicker drive interfaces like SCSI (Small Computer System Interface), more rpm (rotations per minute) like 15,000 rpm, larger drive cache or buffer like 32 MB. The SCSI Hard drives are made for Disk arrays like that of RAID and JBOD.

As a practical instance, a Windows server partition with fundamental disk signature, the scsiport.sys (SCSI port driver file) sends ‘hwStartIo SRB_FUNCTION_SHUTDOWN’ event to SCSI miniport for every partition. It enables the miniport to start the shutdown process.

For a partition with dynamic disk signatures, the expected ‘hwStartIo SRB_FUNCTION_SHUTDOWN’ event doesn’t take place for any of dynamic volumes if the ‘PORT_CONFIGURATION_INFORMATION CachesData=RIGHT’ has been set.

It results as data loss. If you have built the caching controller, which is based upon the Microsoft specifications that declare that controllers would be informed before the shutdown event. You can build it as per the above command for appropriate working of cache or other inner operations.

Cause

In case of RAID (Redundant Array of Independent Disks), you may encounter the data loss and sometimes partitions loss situations due to one or more of the following reasons:

RAID controller relies upon the shutdown IRP (I/O Request Packet) for clearing write-back cache, which is permitted on hard drive. When the cache flush command is issued on the partition, it simply flushes controller cache and results into data loss.

The operating system sends the cache flush command even after ‘Shutdown IRP’ clears the controller cache. In this scenario, the data loss may occur as the data that gets written post last cache flush may get lost.

If you have enabled write-back cache on the partition and improper shutdown occurs, the file system may get corrupted and you may lose all Windows partitions and data from them.

Partition loss and data loss are the situations that can not be accepted by any computer user with valuable data and thus they need to be fixed. These situations are generally recoverable by using Partition Recovery tools.

Partition Recovery tools are third party software that are specifically designed to meet your Partition Recovery needs. Partition Recovery Software come equipped with interactive user interface and detailed documentation. A normal home user can use them easily as they don’t require any prior and sound technical knowledge.

Stellar Phoenix Windows Data Recovery is the ultimate solution of all your partition loss related issues. This powerful Partition Recovery Software thoroughly scans your whole hard drive, locate the lost partitions and then recover them.

Phoenix  Partition Recovery is compatible with the latest versions of Windows Vista, XP, 2003 and 2000. It supports Partition Recovery from FAT16, FAT32, VFAT, NTFS and NTFS5 file systems based Windows partitions.

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