Minimum Hardware Requirements

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Hardware Recommendations
If network performance is a requirement and you have some money to spend, use 10 GigE interfaces and a managed switch. Update files can be applied manually with this method. Very few users will find deduplication provides space savings over using compression. This makes updates safer and testing different versions more convenient. If you plan on Using the phpVirtualBox Template , increase the minimum RAM size by the amount of virtual memory you configure for the virtual machines. For better performance, a mirror is strongly favored over any RAIDZ, particularly for large, uncacheable, random read loads. Compression happens when a block is written to disk, but only if the written data will benefit from compression.

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FreeNAS Hardware Requirements

Once booted, you will see the Console Setup menu. From here you can configure the networking, configure DNS, reboot the system, and so on. Open a web browser and enter the address of the FreeNAS server. There will be one or possibly two interfaces listed. Storage Before a disk can be used it needs to be added to a Volume. The steps are very similar for a Windows XP machine.

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Start this WCF test now. For this reason it is recommended that you use media that is 4GB or larger. One partition holds the current operating system and the other partition is used when you upgrade. This allows you to safely upgrade to a new image or to revert to an older image should you encounter problems.

While this will downclock the USB ports to 2. To see if USB 3. SD card to USB converters are not recommended as these have caused problems for many users. When using a CF adapter, avoid the no-name brands to ensure compatibility, reliability, and performance.

Note that hot plugging is not the same as a hot spare, which is not supported at this time. Suggestions for testing disks before adding them to a RAID array can be found in this forum post.

This article provides a good overview of hard drives which are well suited for a NAS. If you have steady, non-contiguous writes, use disks with low seek times. These cards are expensive and are suited for high end systems that demand performance.

Due to the increased throughput, systems running these cards typically use multiple 10 GigE network interfaces. However, on a drive that is below the minimum recommended size you lose a fair amount of storage space to swap: ZFS uses dynamic block sizing, meaning that it is capable of striping different sized disks. However, if you care about performance, use disks of the same size. Realteks will perform poorly under CPU load as interfaces with these chipsets do not provide their own processors.

At a minimum you will want to use a GigE interface. However, any switches will need to support LACP which means you will need a more expensive managed switch rather than a home user grade switch.

If network performance is a requirement and you have some money to spend, use 10 GigE interfaces and a managed switch. If you are purchasing a managed switch, consider one that supports LACP and jumbo frames as both can be used to increase network throughput. InfiniBand, FibreChannel over Ethernet, or wireless interfaces.

If network speed is a requirement, consider both your hardware and the type of shares that you create.

If the driver supports WOL, it can be enabled using ifconfig 8. To determine if WOL is supported on a particular interface, specify the interface name to the following command. In this example, the capabilities line indicates that WOL is supported for the re0 interface:. If you find that WOL support is indicated but not working for a particular interface, submit a bug report.

Data redundancy and speed are important considerations for any network attached storage system. This section provides an overview of RAID types to assist you in deciding which type best suits your requirements.

Provides zero redundancy, meaning if one disk fails, all of the data on all of the disks is lost. The more disks in the RAID 0, the more likely the chance of a failure. Provides good read performance but may have slower write performance, depending upon how the mirrors are setup and the number of ZILs and L2ARCs.

If a disk fails, it is marked as degraded but the system will continue to operate until the drive is replaced and the RAID is rebuilt. However, should another disk fail before the RAID is rebuilt, all data will be lost. RAID5 "died" back in and should not be used if reliability of your data is important. Benefits from having many disks as performance, fault tolerance, and cost efficiency are all improved relatively with more disks.

The larger the failed drive, the longer it takes to rebuild the array. Reads are very fast but writes are slower than a RAID 5. This type of RAID can survive the failure of any one drive. If you lose a second drive from the same mirrored set, you will lose the array. However, if you lose a second drive from a different mirrored set, the array will continue to operate in a degraded state.

Its advantage over RAID 5 is that it avoids the write-hole and does not require any special hardware, meaning it can be used on commodity disks. RAIDZ1 "died" back in and should not be used if reliability of your data is important.

Generally speaking, if you are using a RAIDZ1 pool and you have a single disk failure you can expect to be forced to destroy, recreate, and restore the pool from backup. It also avoids the write-hole and does not require any special hardware, meaning it can be used on commodity disks. RAIDZ3 offers three parity drives and can operate in degraded mode if up to three drives fail with no restrictions on which drives can fail.

ZFS prefers direct, exclusive access to the disks, with nothing in between that interferes. When determining the type of RAIDZ to use, consider whether your goal is to maximum disk space or maximum performance:. For better performance, a mirror is strongly favored over any RAIDZ, particularly for large, uncacheable, random read loads.

When determining how many disks to use in a RAIDZ, the following configurations provide optimal performance. Array sizes beyond 12 disks are not recommended. The recommended number of disks per group is between 3 and 9. If you have more disks, use multiple groups. The following resources can also help you determine the RAID configuration best suited to your storage needs:.

These resources are also useful to bookmark and refer to as needed:.

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