> For the complete documentation index, see [llms.txt](https://prosbcdocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://prosbcdocs.telcobridges.com/tmedia-documentation/server-and-os-administration/hardware-hard-disks.md).

# Hardware:Hard Disks

The hard disks are one of the hardware components most likely to fail in a system; therefore, it is important for a high-availability system to implement a hard-drive redundancy feature.

#### [RAID](http://en.wikipedia.org/wiki/RAID|)

Although many solutions are available to achieve this goal, the page will talk more specifically about RAID, which is included in some of TelcoBridges' products.

[**RAID level**](http://en.wikipedia.org/wiki/Standard_RAID_levels|)

TelcoBridges has RAID level 1 included in the following products:

* [TSBC-HW-SRV](https://github.com/telcobridges-main/tmedia-wiki/tree/main/_excluded/sbc/freesbc-and-prosbc/README.md)
* [TMG7800-CTRL](https://telcobridges.com/media-gateways/products/tmedia-gateways/tmg7800/)

It is recommended to use at least RAID level 1 to have a fault tolerant system.

**RAID implementation**

There are mainly 3 types of implementation of RAID:

* Hardware RAID
* BIOS RAID (not recommended)
* Software RAID

Latest TelcoBridges products containing RAID uses the hardware implementation.

### Recommended Setup

TelcoBridges highly recommend either storage area network (SAN) and/or RAID 1 and up. The TSBC-HW-SRV and TMG7800-CTRL include RAID 1 hard disk redundancy.


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