mirror of
https://github.com/unraid/webgui.git
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83 lines
3.4 KiB
Plaintext
83 lines
3.4 KiB
Plaintext
Menu="Main:2"
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Title="Cache Devices"
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Cond="($var['fsState']=='Stopped' || $var['cacheSbNumDisks'])"
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---
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<?PHP
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/* Copyright 2015-2016, Lime Technology
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* Copyright 2015-2016, Bergware International.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2,
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* as published by the Free Software Foundation.
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*/
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?>
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<script>
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function cache_status() {
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$.post('/webGui/include/DeviceList.php',{path:'<?=$path?>',device:'cache'},function(data) {
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if (data) $('#cache_device').html(data);
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<?if ($update && $var['fsState']=='Started'):?>
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<?if ($tabbed):?>
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if ($('#tab2').is(':checked')) timer = setTimeout(cache_status,<?=abs($display['refresh'])?>);
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<?else:?>
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setTimeout(cache_status,<?=abs($display['refresh'])?>);
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<?endif;?>
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<?endif;?>
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});
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}
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<?if ($update && $var['fsState']=='Started' && $tabbed):?>
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$('#tab2').bind({click:function() {clearTimeout(timer); cache_status();}});
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<?endif;?>
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cache_status();
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</script>
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<table class="disk_status <?=($var['fsState']=='Stopped'?'small':$display['view']).' '.$display['align']?>">
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<thead><tr><td>Device</td><td>Identification</td><td>Temp.</td><td>Reads</td><td>Writes</td><td>Errors</td><td>FS</td><td>Size</td><td>Used</td><td>Free</td><td>View</td></tr></thead>
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<tbody id="cache_device">
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<?
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foreach ($disks as $disk):
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if ($disk['type']=='Cache') echo "<tr><td colspan='11'> </td></tr>";
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endforeach;
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?>
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</tbody>
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</table>
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> **Colored Status Indicator** the significance of the color indicator at the beginning of each line in *Cache Devices* is as follows:
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>
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> <img src='/webGui/images/green-on.png' class='icon'>Normal operation, device is active.
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>
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> <img src='/webGui/images/green-blink.png' class='icon'>Device is in standby mode (spun-down).
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>
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> <img src='/webGui/images/blue-on.png' class='icon'>New device.
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>
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> <img src='/webGui/images/grey-off.png' class='icon'>No device present, position is empty.
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>
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> **Cache** is a device, or device pool, *outside* the unRAID array. It may be exported for network access just
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> like an Array device. Being outside the unRAID array results in significantly faster write access.
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>
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> There are two ways to configure the Cache:
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>
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> 1. As a single device, or
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> 2. As a multi-device pool.
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>
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> When configured as a single device you may format the device using any supported file system (btrfs, reiserfs,
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> or xfs). This configuration offers the highest performance, but at the cost of no data protection - if the
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> single Cache device fails all data contained on it may be lost.
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>
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> When configured as a multi-device pool, unRAID OS will automatically select *btrfs-raid1* format (for both data
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> and meta-data). btrfs permits any number of devices to be added to the pool and each copy of data is guaranteed
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> to be written to two different devices. Hence the pool can withstand a single-disk failure without losing data.
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>
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> When [User Shares](/Settings/ShareSettings) are enabled, user shares may be configured to
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> automatically make use of the Cache in order to
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> speed up writes. A special background process called the *mover* can be scheduled to run
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> periodically to move user share files off the Cache and onto the Array.
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<?if ($var['fsState'] == "Stopped"):?>
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<div></div>
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> **Slots** select the number of device slots in your server designated for Cache devices.
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<?endif;?>
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