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Chapter 7: Technology Background
243
Ranges of Disk Array Expansion
The Windows 2000 and Windows XP (32-bit) operating systems support a 10-
byte LBA format. As a result, these OSes can only recognize 4 billion addresses.
If you create a logical drive using the default 512 B sector size, the logical drive
will be limited to 2 TB of data, even if there is more space available on your disk
drives.
This limitation does not apply to Windows XP (64-bit), 2003 Server, Vista, and
Linux OSes with the 2.6 kernel. Linux OSes with the 2.4 kernel do not support
variable sector sizes, therefore you cannot apply the solution described here to
those OSes.
Note that once you create your logical drive, you cannot change the size of the
sectors. Nor can you increase the number of address blocks that the OS
recognizes.
You can direct WebPAM PROe to expand a logical drive beyond the maximum
expansion size. When the expansion is finished:
•
WebPAM PROe will show the logical drive in the desired size.
•
Your operating system might show the logical drive at the maximum size
listed in the table below.
Important
•
The Target disk array may require more disk drives than the
Source disk array
•
If the Target disk array requires an EVEN number of disk
drives but the Source disk array has an ODD number, ADD a
disk drive as part of the migration process
•
You cannot reduce the number of disk drives in your disk
array, even if the Target disk array requires fewer disk drives
than the Source disk array
•
RAID 1 (mirroring) works with two drives only. Only a single-
drive RAID 0 disk array or a single-drive JBOD can migrate to
RAID 1. Other RAID Levels use too many drives to migrate
•
You cannot migrate a disk array when it is Critical or
performing activities such as Synchronizing, Rebuilding, and
PDM
•
You cannot migrate to RAID 6 or RAID 60. You cannot
migrate from RAID 60 to another RAID level. You must create
a new disk array and move your data to it
Summary of Contents for E310f
Page 1: ...VTRAK E Class E310f and E310s PRODUCT MANUAL Version 1 1 ...
Page 14: ...VTrak E Class Product Manual xiv ...
Page 22: ...VTrak E Class Product Manual 8 ...
Page 58: ...VTrak E Class Product Manual 44 ...
Page 61: ...Chapter 4 Management with WebPAM PROe 47 Figure 1 The WebPAM PROe log in screen ...
Page 218: ...VTrak E Class Product Manual 204 ...
Page 234: ...VTrak E Class Product Manual 220 Figure 13 Replacing the VTrak controller ...
Page 304: ...VTrak E Class Product Manual 290 ...
Page 316: ...VTrak E Class Product Manual 302 ...