The local disk is always a system (boot) volume. Due to the lack of network delays, the local disk is suitable for workloads where read and write speed indicators are important.
The local disk has a PCIe connection interface over the NVMe protocol and is physically connected directly to the computing server, so it can only be created when creating a server. The local disk is not a required configuration parameter. The cloud server can be created without it.
Local disks have the following features:
- performance: read 12800 IOPS / write 6400 IOPS;
- bandwidth: 300 Mbps;
- disk subsystem configured in RAID10;
- can only be a boot volume of the server and is not used as an additional volume — only network volumes can be connected as additional ones;
- it is impossible to detach local disks from a cloud server and attach to another;
- only one local disk can be connected to the cloud server;
- 2 TB is the recommended limit for the local disk;
- resizing the local disk takes longer than resizing the network volume;
- you cannot create a snapshot of the local disk.