Dell EqualLogic PS6210XS EqualLogic Group Manager Administrator s Guide PS Ser - Page 157

Status unavailable due to SyncRep available (no new connections) unavailable due to internal error Description Solution Volume or snapshot is unavailable because SyncRep is confused, often due to a mismatch between the state in the database and the expected state. Determine the reason for the issue and correct the problem. During a failover, SyncRep is trying to determine Wait for SyncRep for to determine which which volume should be active. Until then, no volume is active. new connections are allowed. Volume or snapshot is unavailable due to an unexpected error. Contact Customer Support for assistance. Volume and Snapshot Requested Status Table 36. Volume and Snapshot Requested Status shows the possible values for the requested status for a volume or snapshot. Table 36. Volume and Snapshot Requested Status Status Description online Administrator set the volume or snapshot online. offline Administrator set the volume or snapshot offline. Computers cannot access an offline volume or snapshot. online (lost blocks) Administrator set the volume or snapshot online despite lost blocks. Authorized computers can access the volume or snapshot. If an application tries to read a lost block, an error occurs. If the block is rewritten, no error occurs, and the block no longer shows a status of lost. About Managing Storage Capacity Utilization On Demand (Thin Provisioning) You can use thin-provisioning technology to more efficiently allocate storage space, while still meeting application and user storage needs. With a thin-provisioned volume, the group allocates space based on volume usage, enabling you to "over-provision" group storage space (provision more space than what is physically available). However, if your environment requires guaranteed space for volume, thin provisioning might be inappropriate. Thin provisioning is most effective if you can accurately predict how volume usage increases over time. NOTE: Dell recommends that you fully understand the benefits and risks of using thin provisioning before implementing it in your environment. Environments that use thin provisioning should have around-the-clock support to handle any space allocation issues and prevent service-level disruption. Thin provisioning volumes is beneficial in a number of environments. For example, if your environment does not easily allow you to expand file systems or raw disks, you can give thin-provisioned volumes excessively large reported sizes to account for future growth. The group automatically allocates space to volumes only if usage patterns warrant the space. Thin provisioning also helps you plan for future group expansion. For example, you can size volumes according to their maximum possible space requirements, even if the group currently cannot provide all the required space. As volume usage increases, you can expand group capacity, with no user impact. You do not need to change drive letters, expand volume sizes, or add volumes. When you create a volume, you specify the reported size for the volume. The reported size is seen by iSCSI initiators. The actual amount of pool space that the group allocates to a volume is called the volume reserve. The value of the volume reserve depends on whether you enable thin provisioning on a volume: • Thin provisioning disabled About Volumes 157