[[fester112:hardware_general]]

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Next revision		Previous revision
fester112:hardware_general [2017/06/24 18:02] – external edit A User Not Logged infester112:hardware_general [2019/05/26 21:18] (current) – [Miscellaneous] dan
Line 20: Line 20:
   - If you follow the advice on ECC memory then the processor must support ECC memory (not all do). All Xeon CPUs do, as do many Pentiums, Celerons, and Core i3 CPUs. No Core i5 or Core i7 CPUs support ECC.   - If you follow the advice on ECC memory then the processor must support ECC memory (not all do). All Xeon CPUs do, as do many Pentiums, Celerons, and Core i3 CPUs. No Core i5 or Core i7 CPUs support ECC.
   - Home users with modest demands generally do not require expensive dual or multiprocessor setups.   - Home users with modest demands generally do not require expensive dual or multiprocessor setups.
-  - If using encryption select a processor that supports AES-NI. Otherwise, don’t use encryption; it results in too much of a performance hit. In fact, unless you have a specific legal requirement for full-disk encryption, don't use it. The risk of data loss is too great.+  - If using encryption select a processor that supports AES-NI. Otherwise, don’t use encryption; it results in too much of a performance hit. **In fact, unless you have a specific legal requirement for full-disk encryption, don't use it. The risk of data loss is too great.**
   - Most modern (i.e., Sandy Bridge or newer) Intel CPUs will have adequate performance for any sort of file sharing over a gigabit network.   - Most modern (i.e., Sandy Bridge or newer) Intel CPUs will have adequate performance for any sort of file sharing over a gigabit network.
  
Line 35: Line 35:
  
   - Use NAS recommended HDDs.   - Use NAS recommended HDDs.
-  - __[[https://forums.freenas.org/index.php?threads/checking-for-tler-erc-etc-support-on-a-drive.27126/|TLER]]__is a useful feature to have on NAS HDDs.+  - __[[https://forums.freenas.org/index.php?threads/checking-for-tler-erc-etc-support-on-a-drive.27126/|TLER]]__ is a useful feature to have on NAS HDDs.
   - Use enough HDDs in your system so you can employ some sort of redundancy within the zpool/s and the vdev/s. If you aim for a minimum of 4 this will allow RAIDZ2 (ooooh yummy).   - Use enough HDDs in your system so you can employ some sort of redundancy within the zpool/s and the vdev/s. If you aim for a minimum of 4 this will allow RAIDZ2 (ooooh yummy).
  
Line 57: Line 57:
   - Don’t buy low quality PSUs.   - Don’t buy low quality PSUs.
   - When selecting a PSU for a quiet server build chose one that will operate at around 50% – 60% of its rated maximum wattage. So if your server draws 300W, select a PSU with a maximum rating of around 600W.   - When selecting a PSU for a quiet server build chose one that will operate at around 50% – 60% of its rated maximum wattage. So if your server draws 300W, select a PSU with a maximum rating of around 600W.
-  - If you have time have a look at __[[https://forums.freenas.org/index.php?threads/proper-power-supply-sizing-guidance.38811/|this]]__article by Jgreco. It is excellent and should help.+  - If you have time have a look at __[[https://forums.freenas.org/index.php?threads/proper-power-supply-sizing-guidance.38811/|this]]__ article by Jgreco. It is excellent and should help.
   - If your budget allows, invest in an Uninterruptible Power Supply (UPS). If your budget doesn't allow, adjust your budget until it does. I know it’s not the most seductive bit of kit (incidentally, the most seductive bit of kit I ever bought was a leather thong, but that’s another story) and it’s expensive (the UPS, not the thong!), but it is good practice to use one. Although the ZFS file system, along with the ZIL is designed to stop data corruption when experiencing a power outage, apparently it can still happen (I don’t know how or why??).   - If your budget allows, invest in an Uninterruptible Power Supply (UPS). If your budget doesn't allow, adjust your budget until it does. I know it’s not the most seductive bit of kit (incidentally, the most seductive bit of kit I ever bought was a leather thong, but that’s another story) and it’s expensive (the UPS, not the thong!), but it is good practice to use one. Although the ZFS file system, along with the ZIL is designed to stop data corruption when experiencing a power outage, apparently it can still happen (I don’t know how or why??).
   - Some server PSUs will not work with a UPS that uses a simulated sine wave output. Some PSUs don’t seem to mind. The reasons are beyond the scope of this guide. I have seen the output of some simulated sine wave UPSs on an oscilloscope and some of them are shockingly bad and do not even come close to a sine wave. If you don’t want to take a chance, then get a UPS that provides a proper sine wave at its output. Unfortunately, this will cost you more.   - Some server PSUs will not work with a UPS that uses a simulated sine wave output. Some PSUs don’t seem to mind. The reasons are beyond the scope of this guide. I have seen the output of some simulated sine wave UPSs on an oscilloscope and some of them are shockingly bad and do not even come close to a sine wave. If you don’t want to take a chance, then get a UPS that provides a proper sine wave at its output. Unfortunately, this will cost you more.
Line 69: Line 69:
   - Remember when any vdev fails in a pool it takes the entire pool with it!   - Remember when any vdev fails in a pool it takes the entire pool with it!
   - Read Cyberjock's [[https://forums.freenas.org/index.php?threads/slideshow-explaining-vdev-zpool-zil-and-l2arc-for-noobs.7775/|guide to ZFS for newbies]]. Then read it again. It would probably be worth reading it a third time.   - Read Cyberjock's [[https://forums.freenas.org/index.php?threads/slideshow-explaining-vdev-zpool-zil-and-l2arc-for-noobs.7775/|guide to ZFS for newbies]]. Then read it again. It would probably be worth reading it a third time.
 +  - Another good beginner's resource for ZFS is [[https://www.ixsystems.com/community/resources/introduction-to-zfs.111/|this guide by Ericlöwe]].
   - Home users will generally not benefit from a SLOG or L2ARC. More RAM is a better buy.   - Home users will generally not benefit from a SLOG or L2ARC. More RAM is a better buy.
  
  • fester112/hardware_general.1498327360.txt.gz
  • Last modified: 2017/06/24 18:02
  • by A User Not Logged in