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3-32 Sun StorEdge 5310 NAS Troubleshooting Guide • December 2004
Caution – Potential data loss or data corruption. Never insert drives into a
command module without first confirming the drive firmware level. Inserting a
drive with the incorrect firmware level may cause data loss or data corruption. For
information on supported drive firmware levels, contact technical support.
Caution – Potential command module failure. Use of nonsupported drives in the
command modules can cause the command module to fail.
Caution – Potential data loss or data corruption. In configurations with mixed
command modules, command modules, or drive modules, all modules must be
operating at the same speed. Refer to the Product Release Notes for any model-
specific restrictions.
3.3.1.1 Upgrade Methods
You can upgrade the command module either by adding new drives or replacing
existing drives. This section describes each method.
Adding New Drives
You can increase the capacity of an command module by installing the additional
drives into empty slots in the module. Additional drives can be installed while the
command module is in operation. To use this upgrade method, refer to “Adding
New Drives to Empty Slots” on page 3-33.
Replace Existing Drives with Greater Capacity Drives
Caution – Potential data loss. Using the wrong drive upgrade procedure can cause
data loss. If you are upgrading drives containing RAID 0 volumes, you must use the
procedure for replacing all of the drives at once. If you are upgrading a drive
containing RAID 1, 3, or 5 volumes, you may use either upgrade procedure.
When replacing existing drives with greater capacity drives, two methods may be
used: replacing all the drives at the same time or replacing one drive at a time. The
method you choose will depend on the RAID level you are using on the storage