Menu="OtherSettings" Title="Disk Settings" Icon="disk-settings.png" ---
Enable auto start: : > If set to 'Yes' then if the device configuration is correct upon server start-up, > the array will be automatically Started and shares exported.
> If set to 'No' then you must Start the array yourself. Default spin down delay: : > This setting defines the 'default' time-out for spinning hard drives down after a period > of no I/O activity. You may override the default value for an individual disk on the Disk Settings > page for that disk. Enable spinup groups: : > If set to 'Yes' then the [Spinup Groups](/Help) feature is enabled. Default partition format: : > Defines the type of partition layout to create when formatting hard drives 2TB in size and > smaller **only**. (All devices larger then 2TB are always set up with GPT partition tables.) > > **MBR: unaligned** setting will create MBR-style partition table, where the single > partition 1 will start in the **63rd sector** from the start of the disk. This is the *traditional* > setting for virtually all MBR-style partition tables. > > **MBR: 4K-aligned** setting will create an MBR-style partition table, where the single > partition 1 will start in the **64th sector** from the start of the disk. Since the sector size is 512 bytes, > this will *align* the start of partition 1 on a 4K-byte boundry. This is required for proper > support of so-called *Advanced Format* drives. > > Unless you have a specific requirement do not change this setting from the default **MBR: 4K-aligned**. Default file system: : > Defines the default file system type to create when an *unmountable* array device is formatted. > > The default file system type for a single or multi-device cache is always Btrfs. Tunable (poll_attributes): : > This defines the disk SMART polling interval, in seconds. A value of 0 disables SMART polling (not recommended). Tunable (enable NCQ): : > If set to **Yes** then *Native Command Queuing* is enabled for all array devices that support NCQ. > > Note: After changing from **No** to **Yes** you must reboot the server for the change to take effect. Changing > from **Yes* to **No** however, takes effect immediately. > > Most users find that overall system performance is better with NCQ disabled. > > *Auto* selects `No`. Tunable (nr_requests): : > This defines the `nr_requests` device driver setting for all array devices. Tunable (md_num_stripes): : Tunable (md_sync_window): : Tunable (md_sync_thresh): : > These tunables let you control certain properties of the unRAID driver. > > Note: For each of these settings, if you set to blank and click Apply, the setting is restored to its default. Tunable (md_write_method): : > Selects the method to employ when writing to enabled disk in parity protected array. > > *Auto* selects `read/modify/write`. Default warning disk utilization threshold (%): : > *Warning disk utilization* sets the default warning threshold for all hard disks utilization. Exceeding this threshold will result in a warning notification. > > When the warning threshold is set equal or greater than the critical threshold, there will be only critical notifications (warnings are not existing). > > A value of zero will disable the warning threshold (including notifications). Default critical disk utilization threshold (%): : > *Critical disk utilization* sets the default critical threshold for all hard disks utilization. Exceeding this threshold will result in an alert notification. > > A value of zero will disable the critical threshold (including notifications). Default warning disk temperature threshold (°): : > *Warning disk temperature* sets the default warning threshold for all hard disks temperature. Exceeding this threshold will result in a warning notification. > > A value of zero will disable the warning threshold (including notifications). Default critical disk temperature threshold (°): : > *Critical disk temperature* sets the default critical threshold for all hard disks temperature. Exceeding this threshold will result in an alert notification. > > A value of zero will disable the critical threshold (including notifications).   :
Global SMART Settings
Default SMART notification value: : > SMART notifications are generated on either an increasing RAW value of the attribute, or a decreasing NORMALIZED value which reaches a predefined threshold set by the manufacturer. > > This section is used to set the global settings for all disks. It is possible to adjust settings for individual disks. Default SMART notification tolerance level: : > A tolerance level may be given to prevent that small changes result in a notification. Setting a too high tolerance level may result in critical changes without a notification. > > This section is used to set the global settings for all disks. It is possible to adjust settings for individual disks. Default SMART controller type: : > By default automatic controller selection is done by smartctl to read the SMART information. Certain controllers however need specific settings for smartctl to work. > Use this setting to select your controller type and fill-in the specific disk index and device name for your situation. Use the manufacturer's documentation to find the relevant information. > > This section is used to set the global settings for all disks. It is possible to adjust settings for individual disks. Default SMART attribute notifications: : Custom attributes (use comma to separate numbers)   : > > The user can enable or disable notifications for the given SMART attributes. It is recommended to keep the default, which is ALL selected attributes, > when certain attributes are not present on your hard disk or do not provide the correct information, these may be excluded. > In addition custom SMART attributes can be entered to generate notifications. Be careful in this selection, > it may cause an avalance of notifcations if inappropriate SMART attributes are chosen. > > This section is used to set the global settings for all disks. It is possible to adjust settings for individual disks. :