Storage array media scan, Changing media scan settings – Dell POWERVAULT MD3600F User Manual

Page 143

Advertising
background image

Configuration: Disk Groups and Virtual Disks

143

Storage Array Media Scan

The media scan is a background operation that examines virtual disks to

verify that data is accessible. The process finds media errors before normal

read and write activity is disrupted and reports errors to the event log.

NOTE:

You cannot enable background media scans on a virtual disk comprised of

Solid State Disks (SSDs).

Errors discovered by the media scan include:

• Unrecovered media error—Data could not be read on the first attempt or

on any subsequent attempts. For virtual disks with redundancy protection,

data is reconstructed, rewritten to the physical disk, and verified and the

error is reported to the event log. For virtual disks without redundancy

protection (RAID level 1, RAID level 5, and RAID level 6 virtual disks), the

error is not corrected but is reported to the event log.

• Recovered media error—Data could not be read by the physical disk on the

first attempt but was successfully read on a subsequent attempt. Data is

rewritten to the physical disk and verified and the error is reported to the

event log.

• Redundancy mismatches error—The first 10 redundancy mismatches that

are found on the virtual disk are reported to the event log.

• Unfixable error—Data could not be read and parity or redundancy

information could not be used to regenerate the data. For example,

redundancy information cannot be used to reconstruct the data on a

degraded virtual disk. The error is reported to the event log.

For more information, see the PowerVault Modular Disk Storage Manager

online help topics.

Changing Media Scan Settings

1 In the AMW, select the Logical tab and select any virtual disk.
2 Select Virtual DiskChangeMedia Scan Settings.

The

Change Media Scan Settings window is displayed.

3 Deselect Suspend media scan if selected.
4 In Scan duration, enter or select the duration (in days) for the media scan.

book.book Page 143 Tuesday, June 18, 2013 3:03 PM

Advertising
This manual is related to the following products: