Apple Xsan 2 - Manual (Page 66)

Create a volume:
1 In the “Create Volume” pane, select “Create a volume now” and click Continue.
If you want to create volumes later, follow the instructions in “Add a volume to a
SAN” on page 73.
2 In the “Volume Name and Type” pane, enter a name for the volume and choose a
volume type that matches the type of work the volume will support.
For the volume name, use only uppercase letters (A–Z), lowercase letters (a–z),
numbers (0–9), and underscores ( _ ). Don’t include spaces or hyphens. The maximum
length is 70 characters.
The volume type you choose determines how the setup assistant configures affinity
tags and storage pools on the volume. For information, see “How Xsan storage is
organized” on page 34.
3 Optionally, click Advanced Settings and adjust the following volume settings:
Block Allocation Size: If you’re not sure what value to use, use the preset size or see
“Set the block allocation size” on page 80.
Allocation Strategy: Choose how storage for files is allocated among the storage
pools that belong to the volume. If you choose Round Robin, each request for space is
assigned to the next available storage pool in turn. If you choose Fill, space is allocated
on the first storage pool until it’s full, then on the second storage pool, and so on. If
you choose Balance, space is allocated on the storage pool with the most free space.
For more information, see “Choose an allocation strategy” on page 51.
Spotlight: Enable this if you want Macintosh clients to search the contents of the
volume using Spotlight.
Native Extended Attributes: Select this option if all computers on your Xsan 2.3 SAN
are Macs (which must have Xsan 2.2.1 or 2.3 to be on the SAN), and you want to ensure
the best possible performance by storing related information for each file inside the
file itself instead of in separate hidden files. You can’t deselect this option for a volume
that was created with the option selected.
Access Control Lists: Leave this selected if you want to use access control lists (ACLs)
to control access to files and folders on the volume.
Case Insensitivity: Select this if all the computers on your SAN have Mac OS X Lion,
and you want this volume to ignore capitalization in filenames. For example, myfile,
MyFile, and MYFILE are all the same filename if this option is turned on. This option is
on by default if the SAN consists only of Macs with Lion.
Windows ID Mapping: If you have Windows clients on your SAN, choose how they
map user and group information to the Xsan-compatible user IDs (UIDs) and group IDs
(GIDs), which they need so they can access Xsan volumes. For more information, see
“Map Windows user and group IDs” on page 100.
66 Chapter 4 Set up a SAN