Appendix C: Working With Volumes Over 2Tb In Size - WiebeTech RTX400-UR User Manual

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UDV IO Fault
Warning
Warning VG Failed
Warning UDV Failed
Warning
Global CV Adjustment Failed
Info Global Cache
Error Global CV Creation Failed
Info
UDV Rename
Info VG Rename
Set VG Dedicated Spare
Info
Disks
Info
Set Global Disks
Info UDV Read-Only
WRBK Cache Policy
Info
WRTHRU Cache Policy
Info
Info High priority UDV
Info
Mid Priority UDV
Info Low Priority UDV

Appendix C: Working with Volumes over 2TB in size

Although the RTX can create data volumes larger than 2TB, operating systems cannot usually access
such volumes. This is because most systems support only 32-bit LBA (Logical Block Addressing).
Newer operating systems (Windows Server 2003, Vista, Mac OS 10.5.x) should be able to use 2TB+
volumes without difficulty. You will simply need to do one of the following two things while creating the
UDV (User Data Volume):
• Change the LBA to 64-bit
• Increase the block size to 4096
Windows
Neither of the options above will work for Windows versions before Server 2003. You will need to make
more than one UDV, each less than 2000GB in size. Each UDV also needs a different LUN.
Mac OS
Although Mac OS 10.4.x supports only 32-bit LBA, increasing the block size to 4096 will allow you to
create a 2TB+ volume that is usable by the OS.
Linux
Versions of Linux vary, but using one of the above methods may allow you to create a 2TB+ volume that
your distribution can use.
R T X - U R U s e r ' s M a n u a l
Error: IO failure for stripe number <number> in UDV
<name>.
Error: Failed to access VG <name>.
Error: Failed to access UDV <name>.
Error: Failed to adjust the size of the global cache.
Info: The global cache is OK.
Error: Failed to create the global cache.
Info: UDV <name> has been renamed as <name>.
Info: VG <name> has been renamed as <name>.
Info: Assigned Disk <slot> to be VG <name>
dedicated spare disk.
Info: Assigned Disk <slot> to the Global Spare Disks.
Info: UDV <name> is a read-only volume.
Info: Used the write-back cache policy for UDV
<name>.
Info: Used the write-through cache policy for UDV
<name>.
Info: UDV <name> is set to high priority.
Info: UDV <name> is set to mid priority.
Info: UDV <name> is set to low priority.
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