Hi Vaughan, NCQ feature is only for SATA. Enabling / Disabling NCQ through mpt3sas/lsiutil support is only for SATA drives. Thanks, Suganath On Mon, Feb 25, 2019 at 8:12 AM caoxt@xxxxxxxxxx <caoxt@xxxxxxxxxx> wrote: > > Hi Suganath, > > [448435.392210] scsi 4:0:0:0: atapi(n), ncq(n), asyn_notify(n),smart(y), fua(n), sw_preserve(y) > ^^^ You example has obvious output of ncq setting. However, my dmesg below isn't like yours: > > Feb 21 15:38:33 node95 kernel: mpt3sas0: Current Controller Queue Depth(3835),Max Controller Queue Dept > Feb 21 15:38:33 node95 kernel: Capabilities=( > Feb 21 15:38:33 node95 kernel: ,NCQ > ... > Feb 21 15:38:41 node95 kernel: scsi 0:0:3:0: Direct-Access HGST HUH721212AL5200 A3D0 PQ: 0 ANSI: 6 > Feb 21 15:38:41 node95 kernel: scsi 0:0:3:0: SSP: handle(0x0012), sas_addr(0x5000cca2531f0f16), phy(2), device_name(0x5000cca2531f0f17) > Feb 21 15:38:41 node95 kernel: scsi 0:0:3:0: SSP: enclosure_logical_id(0x5000ccab0400c600), slot(11) > Feb 21 15:38:41 node95 kernel: scsi 0:0:3:0: qdepth(254), tagged(1), simple(0), ordered(0), scsi_level(7), cmd_que(1) > > By reading the code, I found ncq setting is reported via > if (!ssp_target) > _scsih_display_sata_capabilities(ioc, handle, sdev); > > So, all my disks are ssp_target? my lsscsi output is below: > # lsscsi |head > [0:0:0:0] disk HGST HUH721212AL5200 A3D0 /dev/sdb > [0:0:1:0] enclosu HGST ScaleApex 4U60 0101 - > [0:0:2:0] disk HGST HUH721212AL5200 A3D0 /dev/sdc > [0:0:3:0] disk HGST HUH721212AL5200 A3D0 /dev/sdd > ... > > Then new question comes: Does NCQ make sense for SSP targets? > > Regards, > Vaughan
