Dell PowerEdge R740 EMC Boot Optimized Server Storage-S1 Users Guide - Page 13

Non-RAID disk support, TRIM, Quick initialization, Erase physical disk

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Non-RAID disk support By default, all disks are in an unconfigured state. NOTE: • For the BOSS-S1 card, unconfigured drives are automatically non-RAID drives. To convert RAID drives to non-RAID drives, delete the virtual disk. • The BOSS-S1 only supports one configured (RAID) and two unconfigured states. The BOSS-S1 card does not break unconfigured drives into RAID and non-RAID states. TRIM TRIM (Non-RAID physical disk) allows an operating system to delete a block of data that is no longer considered in use by SSDs. For supported operating systems, the TRIM command resolves the write amplification issue. When an operating system deletes a file, the file is marked for deletion in the file system, but the contents on the disk are not actually erased. As a result, the SSDs do not know the Logical Block Addressing (LBA) previously occupied can be erased. With the introduction of TRIM, when a file is deleted, the operating system sends a TRIM command along with the LBAs that do not contain valid data to the physical disk. Quick initialization Quick initialization is a feature that enables you to erase the files and file systems from the virtual disk while keeping the virtual disk configuration intact. Erase physical disk The erase physical disk feature deletes metadata from the physical disk. This feature can be enabled only when the physical disk is not part of any virtual disk. CAUTION: Performing erase physical disk removes all the data from the physical disk. Features 13

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Non-RAID disk support
By default, all disks are in an unconfigured state.
NOTE:
•
For the BOSS-S1 card, unconfigured drives are automatically non-RAID drives. To convert RAID drives to non-RAID
drives, delete the virtual disk.
•
The BOSS-S1 only supports one configured (RAID) and two unconfigured states. The BOSS-S1 card does not break
unconfigured
drives into RAID and non-RAID states.
TRIM
TRIM (Non-RAID physical disk) allows an operating system to delete a block of data that is no longer considered in use by SSDs. For
supported operating systems, the TRIM command resolves the write amplification issue. When an operating system deletes a file, the file
is marked for deletion in the file system, but the contents on the disk are not actually erased. As a result, the SSDs do not know the
Logical Block Addressing (LBA) previously occupied can be erased. With the introduction of TRIM, when a file is deleted, the operating
system sends a TRIM command along with the LBAs that do not contain valid data to the physical disk.
Quick initialization
Quick initialization is a feature that enables you to erase the files and file systems from the virtual disk while keeping the virtual disk
configuration intact.
Erase physical disk
The erase physical disk feature deletes metadata from the physical disk. This feature can be enabled only when the physical disk is not part
of any virtual disk.
CAUTION:
Performing erase physical disk removes all the data from the physical disk.
Features
13