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wiz 2020-01-14 09:30:34 +00:00
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commit 592c2ae6b6
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17
share/man/man4/wd.4
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@ -1,4 +1,4 @@
.\" $NetBSD: wd.4,v 1.22 2020/01/13 21:43:38 jdolecek Exp $
.\" $NetBSD: wd.4,v 1.23 2020/01/14 09:30:34 wiz Exp $
.\"
.\"
.\" Copyright (c) 1994 James A. Jegers
@ -70,11 +70,14 @@ The following
variables control behavior of disks attached using this driver:
.Bl -tag -width 8n
.It Dv hw.wdX.use_ncq
Whether to use NCQ ATA commands for the disk. Only effective when the disk
hardware actually claims to support NCQ. Default to true.
Whether to use NCQ ATA commands for the disk.
Only effective when the disk hardware actually claims to support
NCQ.
Default to true.
.It Dv hw.wdX.use_ncq_prio
Use optional NCQ priority for high-priority I/O like meta-data. Intended
only for experimental use right now, might negatively affect performance.
Use optional NCQ priority for high-priority I/O like meta-data.
Intended only for experimental use right now, might negatively
affect performance.
This setting only has effect if
.Dv hw.wdX.use_ncq
is also true.
@ -85,8 +88,8 @@ Certain
.Tn Samsung
.Tn 860 EVO
SSD drives have firmware bug which causes interface CRC errors when NCQ
ATA commands are used. For this reason NCQ is disabled for these drives
by default.
ATA commands are used.
For this reason NCQ is disabled for these drives by default.
Affected drives include, but are not limited to:
.Pp
.Bl -tag -width Ds -offset indent -compact