ZStack allows you to add iSCSI storages. Without reaching to each host for making further configurations, ZStack automatically logs in to iSCSI, automatically scans and discovers disks, and automatically configures iSCSI connections. The entire process is convenient and quick. Specifically, iSCSI disks that can be correctly identified support the following usages:

• iSCSI disks can be passed through directly to VM instances.
• iSCSI disks can be added as Shared Block primary storages in shared block.

ZStack supports FC storage passthroughs, automatically scans and discovers FC storages that you preconfigured, and provides a direct display of FC storage details. Specifically, FC LUN devices that can be correctly detected support the following usages:

• LUN devices of a FC storage can be passed through to VM instances.
• LUN devices of a FC storage can be added as Shared Block primary storages in shared block.

The steps for planned maintenance of an iSCSI storage are as follows:

1. Add a new iSCSI device to ZStack.
2. On the iSCSI server side, configure the server IP address and other information that can be accessed. Make sure that the iSCSI service side can access the iSCSI server properly.
3. Log in to the Cloud via the UI, choose Hardware > SAN Storage > iSCSI Storage, and add an iSCSI server.
4. Enter the login information and log in to the iSCSI storage.
5. Synchronize data from the iSCSI storage.

The steps for planned maintenance of a FC SAN storage are as follows:

1. Add a FC SAN storage to ZStack.
2. Contact the storage vendor to map the FC SAN storage to a host and make sure that the storage LUN partitioned by the FC SAN storage can be recognized properly on the server.
3. Log in to the Cloud via the UI, choose Hardware > SAN Storage > FC Storage, and view the mapped FC SAN storage.
4. After the scanning is finished, click Sync Device Info to synchronize the storage data.