# daxctl−online−memory(1)

[NAME](#name)\
[SYNOPSIS](#synopsis)\
[EXAMPLES](#examples)\
[DESCRIPTION](#description)\
[OPTIONS](#options)\
[COPYRIGHT](#copyright)\
[SEE ALSO](#see-also)

## NAME

daxctl−online−memory − Online the memory for a device that is in system−ram mode

## SYNOPSIS

*daxctl online−memory*  \<dax0.0> \[\<dax1.0>...\<daxY.Z>] \[\<options>]

## EXAMPLES

• Reconfigure dax0.0 to system−ram mode, don’t online the memory

```
# daxctl reconfigure-device --mode=system-ram --no-online --human dax0.0
{
 "chardev":"dax0.0",
 "size":"7.87 GiB (8.45 GB)",
 "target_node":2,
 "mode":"system-ram"
}
```

• Online the memory separately

```
# daxctl online-memory dax0.0
dax0.0: 62 new sections onlined
onlined memory for 1 device
```

• Onlining memory when some sections were already online

```
# daxctl online-memory dax0.0
dax0.0: 1 section already online
dax0.0: 61 new sections onlined
onlined memory for 1 device
```

## DESCRIPTION

Online the memory sections associated with a device that has been converted to the system−ram mode. If one or more blocks are already online, print a message about them, and attempt to online the remaining blocks.

This is complementary to the *daxctl−reconfigure−device* command, when used with the *−−no−online* option to skip onlining memory sections immediately after the reconfigure. In these scenarios, the memory can be onlined at a later time using *daxctl−online−memory*.

## OPTIONS

−r, −−region=

Restrict the operation to devices belonging to the specified region(s). A device−dax region is a contiguous range of memory that hosts one or more /dev/daxX.Y devices, where X is the region id and Y is the device instance id.

−u, −−human

By default the command will output machine−friendly raw−integer data. Instead, with this flag, numbers representing storage size will be formatted as human readable strings with units, other fields are converted to hexadecimal strings.

−v, −−verbose

Emit more debug messages

## COPYRIGHT

Copyright (c) 2016 − 2019, Intel Corporation. License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

## SEE ALSO

[daxctl−reconfigure−device(1)](https://docs.pmem.io/ndctl-user-guide/v66/daxctl-man-pages/daxctl-reconfigure-device), [daxctl−offline−memory(1)](https://docs.pmem.io/ndctl-user-guide/v66/daxctl-man-pages/daxctl-offline-memory)