Menu="Main:2" Title="Pool Devices" Tag="bullseye" Cond="($pool_devices || $var['fsState']=='Stopped')" --- "> "> "?>
_(Device)__(Identification)__(Temp)_._(Reads)__(Writes)__(Errors)__(FS)__(Size)__(Used)__(Free)__(View)_
 
:help3 > **Colored Status Indicator** the significance of the color indicator at the beginning of each line in *Pool Devices* is as follows: > > Normal operation, device is active. > > Device is in standby mode (spun-down). > > New device. > > No device present, position is empty. > > **Pool Devices** is a single device, or pool of multiple devices, *outside* the Unraid array. It may be exported for network access just > like an Array device. Being outside the Unraid array results in significantly faster write access. > > There are two ways to configure the Pool devices: > > 1. As a single device, or > 2. As a multi-device pool. > > When configured as a single device you may format the device using any supported file system (btrfs, reiserfs, > or xfs). This configuration offers the highest performance, but at the cost of no data protection - if the > single pool device fails all data contained on it may be lost. > > When configured as a multi-device pool, Unraid OS will automatically select *btrfs-raid1* format (for both data > and meta-data). btrfs permits any number of devices to be added to the pool and each copy of data is guaranteed > to be written to two different devices. Hence the pool can withstand a single-disk failure without losing data. > > When [User Shares](/Settings/ShareSettings) are enabled, user shares may be configured to > automatically make use of the Pool device in order to > speed up writes. A special background process called the *mover* can be scheduled to run > periodically to move user share files off the Cache and onto the Array. :end
:help4 > **Slots** select the number of device slots in your server designated for Cache devices. :end