Maintaining and Servicing the NVIDIA DGX Station
DGX Station
DU-08255-001 _v4.6 | 57
$
sudo configure_raid_array.py -r
Note:
The time required to rebuild a RAID 5 array depends on factors such as system load, SSD
capacity, and the number of SSDs in the array. Rebuilding the array of three 1.92-terabyte SSDs
in the DGX Station may require several hours.
You can monitor the progress of a long-running rebuild by examining the contents of the
/
proc/mdstat
file:
$
cat /proc/mdstat
Personalities : [raid0] [linear] [multipath] [raid1] [raid6] [raid5] [raid4]
[raid10]
md0 : active raid5 sdb[0] sdd[3] sdc[1]
3750486016 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/2] [UU_]
[>....................] recovery = 4.0% (75580956/1875243008)
finish=438.3min speed=68419K/sec
bitmap: 2/14 pages [8KB], 65536KB chunk
unused devices: <none>
In this example, the rebuild is 4.0% complete and the rebuild is estimated to finish in 438.3
minutes.
The RAID array is rebuilt with its existing RAID level.
‣
If the array is a RAID 0 array, all data that was on the array is erased after array is rebuilt.
‣
If the array is a RAID 5 array, the data on the array is preserved after array is rebuilt.
If you have rebuilt a RAID 0 array and have a backup of data on the array that you want to
preserve, restore the data from the backup.
4.7.6. Configuring the SSDs for Data Storage as an
NFS Cache
As supplied from the factory, the SSDs in the DGX Station for data storage are configured
for local persistent storage. If your application data is stored in remote NFS-mounted file
systems, you can improve application performance by configuring the data SSDs as an NFS
cache and configuring the NFS-mounted file systems to use this cache.
If any data that you want to preserve is stored on the SSDs for data storage, move this data to
another file system.
1.
Optional:
If the SSDs in the DGX Station for data storage are configured in a RAID 5 array,
change the RAID level of the array to RAID 0.
$
sudo configure_raid_array.py -m raid0
Because cache data is volatile, you can use the full capacity of the RAID array without
redundancy and not risk loss of any persistent data.
2. Download information from all configured sources about the latest versions of the
packages.
$
sudo apt update
3. Install the
cachefilesd
package, which contains the cache daemon and its associated
files, such as the startup and configuration files.
$
sudo apt install cachefilesd
Summary of Contents for DGX Station
Page 1: ...DU 08255 001 _v4 6 July 2020 DGX Station User Guide ...
Page 6: ...About this Guide DGX Station DU 08255 001 _v4 6 vi ...
Page 83: ...Maintaining and Servicing the NVIDIA DGX Station DGX Station DU 08255 001 _v4 6 77 ...
Page 92: ...Connections Controls and Indicators DGX Station DU 08255 001 _v4 6 86 ...
Page 95: ...Compliance DGX Station DU 08255 001 _v4 6 89 C 6 China RoHS Material Content ...
Page 99: ...Compliance DGX Station DU 08255 001 _v4 6 93 C 13 South Korea KC C 14 Taiwan BSMI ...
