CRU RAX840-IR - Manual (Page 10)

CRU
3.10 Creating volumes over 2TB in size
Although RAX can create data volumes larger than 2TB, some older operating systems cannot access
such volumes. This is because they support only 32-bit LBA (Logical Block Addressing).
Newer operating systems should be able to use 2TB+ volumes without difficulty. You will simply need to
do one of the following two things while creating a Virtual Disk:
 Change the LBA to 64-bit
 Increase the block size to 4096
Windows
Neither of the options above will work for operating systems older than Windows XP. You need to make
more than one Virtual Disk, each less than 2000GB in size. Each Virtual Disk also needs a different LUN.
Mac OS X
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.
4. Usage with Mac and Windows Operating Systems
4.1 Usage with Mac OS X
4.1.1 Compatibility
RAX uses 3.5-inch SATA (Serial-ATA) hard drives only. RAX does not require drivers for operation under
Mac OS X. However, if you install a host card specifically to work with this product, that card may require
drivers. See your card’s User Manual for drivers and instructions.
4.1.2 Formatting a drive
If you purchased your RAX pre-populated with hard drives, this step should not be necessary unless you
wish to change the format or erase the drive. To format, use Mac OS X’s Disk Utility (found in the
applications folder).
a) Click on the drive in the window to the left (see picture below).
b) Click the Erase tab in the window to the right (see picture below).
c) Select the format type. Most users prefer Mac OS Extended with Journaling (HFS+), which is required
for compatibility with Time Machine (OS 10.5 or newer). If you need to use your drive with both Mac and
Windows computers, select MS-DOS File System instead.
d) Enter a name for the new volume and then click “Erase” to start the process.
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