Features new to Windows 8: Difference between revisions

Revision as of 05:18, 30 June 2021

Revision as of 21:18, 15 August 2021

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===NVM Express===

Windows 8.1 also gained support for [[NVM Express]] (NVMe), a new industry standard protocol for [[PCIe]]-attached storage, such as PCIe flash cards.<ref name="Heron"/><ref>{{cite web|url=http://www.myce.com/news/windows-8-1-to-support-hybrid-disks-and-native-nvme-driver-68663/ |title=Windows 8.1 to support hybrid disks and adds native NVMe driver |website=Myce.com |date=September 6, 2013 |access-date=January 20, 2014}}</ref>

Windows 8.1 also supports the [[TRIM (computing)|TRIM]] command for PCI Express SSDs based on [[NVM Express|NVMe]] (Windows 7 supported TRIM only for [[AHCI]]/[[SATA]]) drives and only the ones which were connected internally via the [[M.2]] or SATA/[[Parallel ATA|IDE]] connectors. Windows 8.1 supports the [[SCSI]] unmap command which is a full analog of the SATA TRIM command for devices that use the SCSI driver stack. If external SSD drives as well as the device [[firmware]] in the bridge chip both support TRIM, Windows 8.1 can perform a TRIM operation on these external SATA and NVMe SSDs that connect via [[USB]] as long as they use the [[USB Attached SCSI]] Protocol (UASP).

Windows 8.1 also introduces a manual TRIM function via [[Microsoft Drive Optimizer]] which can perform an on-demand user-requested TRIM function on internal and external SSDs. Windows 7 only had automatic TRIM for internal SATA SSDs built into system operations such as Delete, Format etc.

==See also==