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- DOCUMENT:Q102037 04-NOV-1993 [W_NT]
- TITLE :Drive Mirroring Can Cause NTFS to Hot-Fix too Often
- PRODUCT :Windows NT
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:
-
- ----------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT operating system, version 3.1
- - Microsoft Windows NT Advanced Server, version 3.1
- ----------------------------------------------------------------------
-
- When the Windows NT mirror support code encounters a sector-read error
- on one member of the mirror set, it corrects the error if the
- underlying hardware supports this (true for SCSI devices). After
- correcting the error on one of the members, the mirror set code
- returns an informational status to the file system indicating that the
- data was recovered by reading from the secondary copy.
-
- This informational status causes NTFS to scan both members of the
- mirror set for faulty sectors (including the secondary member, which
- the mirror set code did not scan for faulty sectors). If faulty
- sectors are located on the secondary member, NTFS will map this sector
- from use at the file system level instead of having the mirror set
- code map it for use at the hardware level.
-
- There is no data loss due to this error; however, there is the chance
- NTFS will map sectors for use that could have been recovered by
- hardware support.
-
- Additional reference words: 3.10
- KBCategory:
- KBSubCategory: FILSYS
-
- =============================================================================
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- Copyright Microsoft Corporation 1993.