Methods used to set the grain size


A command is used to set the grain size. In the create lun command, set the value of the Grain_size parameter to specify the grain size.

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Method used to configure a proper sector size for disk partition in Windows
You can configure a proper sector size for disk partition in Windows as follows: During disk partitioning, configure the sector size based on the logical disk size, to prevent disks' read and write performance deterioration due to long time of formatting disks. The sector size is defined as the cluster size. Choose Computer > Manager > Disk Management > Format and go to the cluster configuration page. When various file systems are created on a variety of disks, the cluster sizes of disks are also different.

Method used to set hot-spare disks
Prerequisite: The system has free disks. Precautions: You need to create hot spare disks to ensure the reliability of the storage device. For controller enclosures with integrated disks and controllers, the number of hot spare disks must not be smaller than the total number of controller enclosures and disk enclosures. For controller enclosures with separated disks and controllers, the number of hot spare disks in the storage system must not be smaller than the number of disk enclosures. The type and capacity of a hot spare disk must be the same as those of RAID group member disks. Note: If the storage system has additional free disks, you can set more hot spare disks for even higher system reliability. Currently, storage systems support global hot spare disks only, and you cannot assign a hot spare disk to a specific RAID group. Coffer disks cannot be used as hot spare disks. Only free disks can be set as hot spare disks. The procedures are as follows: In the ISM navigation tree, choose All Devices > SN_XX > Device Info > Storage Unit > Disks. (SN_XX is the name of the target storage device.) In the function pane of ISM, select disks that you want to set to hot spare disks. On the upper function pane of ISM, choose Hot Spare Disk > Set. The system displays the result of setting hot spare disks. Upon successful creation of hot pare disks, Logical Type of each selected hard disk changes to Hot Spare Disk. If the operation fails, select another available disk as the hot spare disk based on the error message. The results are as follows: After a hot spare disk is created, on the right function pane, the Running Status of the disk is Free Hot Spare Disk. When faulty member disks result in a RAID group failure, the created hot spare disk can take over the data stored on the faulty member disks to ensure normal operation of the RAID group. In this case, Running Status of the hot spare disk changes to Used Hot Spare Disk.

Method used to reset CT3100 to factory settings
You can reset CT3100 to factory settings as follows: (Note that all user configurations will be lost after the operations, so perform the operations with caution.) 1. Restart the TC and press Ctrl during the startup. 2. Press Ctrl+U and select Restore ConfigurationRestore from the displayed menu.

Method used to view the memory size and CONFIGUREs for OceanStor 9000 V100R001C01 on DeviceManager
Perform the following operations to view the memory size and CONFIGUREs for OceanStor 9000 V100R001C01 on DeviceManager: - Choose System > . - In the navigation tree, select the node you wish to view. - In the area on the right, click the Basic Information tab. - Click the two-headed arrow to expand and view the information.

Method used to set the LUN stripe depth
1. The stripe depth can only be set during LUN creation and cannot be modified after being created. 2. Go to the Create LUN dialog box. In the navigation tree, click the storage system node and choose Storage Resources > LUNs. In the right function pane, choose Create > LUN. The Create LUN dialog box is displayed. Set the parameters in the Create LUN dialog box.

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