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[WHCK] What is Trim Zero-Range Test ? RRS feed

  • Question

  • According to help file, "if the device includes ATA non-NCQ Trim support",  is non-NCQ means no NCQ ? If it is not, what is it?

    And I wonder why NCQ relates to Trim? I mean the Native-Command-Queuing just for HDD, Trim for SSD(NAND Flash). Or it maybe just a SSD buffer build on HDD?

    Very thanks for help!

    Wednesday, January 30, 2013 3:39 AM

Answers

  • Trim Zero-Range Test is a generalized test, not only for ATA devices. For any devices that support Trim (including Trim, Unmap, discard, etc.), it checks whether the Trimmed area are cleared out after sending down Trim. For SCSI devices, if LBPRZ bit is set to zero, then Trim Zero-Range Test will be included by HCK.

    • Marked as answer by Lester.RedSox Monday, February 4, 2013 6:20 AM
    Wednesday, January 30, 2013 10:33 PM