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19 .Nd Intel NVMe compliant storage driver
25 framework to provide access to
27 NVMe compliant solid-state storage devices.
29 NVMe devices supporting multiple namespaces will present each
32 instance in the system.
37 driver can be configured by defining properties in the
40 The parameters are considered an unstable interface, subject to
41 change without notice.
42 The following properties are currently supported:
45 This can be set to 0 to allow
47 to attach to devices supporting newer version of the NVMe
49 The default value is 1, limiting
51 to work with devices up to specification version 1.1.
52 .It Va ignore-unknown-vendor-status
53 This can be set to 1 to allow
55 to continue operating even if it receives an unknown vendor command
57 .It Va admin-queue-len
58 This is the number of entries in the admin command queue.
59 Legal values are between 16 and 4096, the default value is 256.
61 This is the number of entries in each I/O command queue.
62 Legal values are between 16 and 65536, the default value is 1024.
63 .It Va async-event-limit
64 This is the maximum number of asynchronous event requests issued by
66 Asynchronous events are used to report error conditions.
67 The driver will never use more asynchronous events than this value, or
68 what the hardware supports if it is less, or 1/10th of the admin queue
70 .It Va volatile-write-cache-enable
71 This property can be set to 0 to disable the volatile write cache, if
72 the hardware supports it.
73 The default setting is 1, which enables the volatile write cache.
74 .It Va min-phys-block-size
75 This is the minimum physical block size that is reported to
77 This value must be a power of 2 greater than or equal to 512.
78 If the device reports a best block size larger than what is
79 specified here the driver will ignore the value specified here.
83 .Bl -tag -compact -width Pa
84 .It Pa /dev/dsk/cntnd0sn
85 Block device minor nodes.
86 .It Pa /dev/rdsk/cntnd0sn
87 Raw block device minor nodes.
90 In the device minor nodes, the following substitutions may occur:
91 .Bl -tag -offset indent -width Va
93 A controller number, typically one for each
96 Controller numbers are dynamically assigned by the system.
99 This is the namespace EUI64 if available, or the namespace ID used by
101 Namespace ID 0 is reserved, hence target numbers start with 1.
105 number, representing a subset of the disk.