# ASR9k: Low memory upgrade

If you are running low space on disk0 of RSP you will not be able to upgrade a system. There are at least four options to resolve this.

## Remove inactive packages

First of all you don't need inactive packages.

```bash
admin# show install inactive
admin# install remove inactive
```

## Remove FPD pie

System needs the FPD pie only during first line card boot with new version to upgrace a microcode. Later this package only consumes space.

```bash
admin# install deactivate disk0:asr9k-fpd-px-4.3.4
admin# install commit
admin# install remove disk0:asr9k-fpd-px-4.3.4
```

## Flexible disk installs

Starting 4.3.4 IOS XR supports [flexible disk installs](http://www.cisco.com/c/en/us/td/docs/routers/asr9000/software/asr9k_r4-3/system_management/configuration/guide/b_sysman_cg43asr9k/b_sysman_cg43asr9k_chapter_0100.html#concept_4AD30BCA80FD484DAFCE08362851CC0D). It meens you can use disk1 as boot media. I would not recommend this approach on releases lower than 5.1.3 because of bug [CSCva62399](https://bst.cloudapps.cisco.com/bugsearch/bug/CSCva62399). System will still count free space on disk0 by mistake. On 5.1.3 use SMU or Service Pack 10.

```
RP/0/RSP0/CPU0:asr9k#Error:    The install operation failed due to a system error.
Error:
Error:    ERROR: Node responded with an error when completing the check of disk space. (Details: 'Install Helper' detected the 'fatal' condition 'stat() failed': No such file or directory)
Error:    AFFECTED NODE(S): 0/RSP0/CPU0
Error:    TECH SUPPORT:
Error:     Please collect diagnostic information using '(admin) show tech-support install'
Install operation 9 failed at 15:33:40 MSK Sun Apr 16 2017.
```

## Turboboot

Option of last resort is a [turboboot](https://supportforums.cisco.com/document/123576/asr9000xr-understanding-turboboot-and-initial-system-bring).