本篇關於希捷磁碟休眠的配置方法

準備設定的軟體

下載地址

https://raw.githubusercontent.com/Seagate/ToolBin/master/SeaChest/PowerControl/v1.10.0/Linux/SeaChest_PowerControl_1100_11923_64

或者通過

http://support.seagate.com/seachest/SeaChestUtilities.zip

下載後解壓拿到二進位制檔案

注意版本儘量用這個版本，不同的版本命令不同，可以有的重要命令不支援，所以限定這個版本即可

磁碟休眠相關命令

預設磁碟開啟的是idle_a的節能模式，這個模式實際上不省電

伺服器的操作是禁用了一些內部服務，減少處理器和通道功耗，磁碟還是全速轉動

idle b 模式
是解除安裝磁頭到硬碟斜坡

官方給出的功耗資料

https://www.seagate.com/www-content/product-content/enterprise-hdd-fam/enterprise-capacity-3-5-hdd/enterprise-capacity-3-5-hdd/en-us/docs/100791104c.pdf

idle_A      4.36
idle_B      2.98
idle_C      2.34
Standby     0.80

考慮恢復時間和功耗的節省問題，我們選擇idle_B

關閉AB模式，也就是關閉省電模式

./SeaChest_PowerControl_1100_11923_64 -d /dev/sdp  --disableMode --changePower --powerMode idle_b
./SeaChest_PowerControl_1100_11923_64 -d /dev/sdp  --disableMode --changePower --powerMode idle_a

開啟B模式的省電模式，並設定休眠時間為60s
後面的單位為100ms

./SeaChest_PowerControl_1100_11923_64 -d /dev/sdp  --disableMode --changePower --powerMode idle_a
./SeaChest_PowerControl_1100_11923_64 -d /dev/sdp  --enableMode --changePower --powerMode idle_b  --modeTimer 600
 

這個可以不管什麼情況，都把A模式關閉了，否則同時設定的時候，會優先進入a模式

檢查當前的省電設定情況

[root@node120 ~]# ./SeaChest_PowerControl_1100_11923_64 -d /dev/sdp --showEPCSettings
==========================================================================================
 SeaChest_PowerControl - Seagate drive utilities - NVMe Enabled
 Copyright (c) 2014-2019 Seagate Technology LLC and/or its Affiliates, All Rights Reserved
 SeaChest_PowerControl Version: 1.10.0-1_19_23 X86_64
 Build Date: Jun 10 2019
 Today: Mon Aug 24 10:51:36 2020
==========================================================================================

/dev/sg17 - ST10000NM0016-1TT101 - ZA2CRY9G - ATA
.

===EPC Settings===
	* = timer is enabled
	C column = Changeable
	S column = Saveable
	All times are in 100 milliseconds

Name       Current Timer Default Timer Saved Timer   Recovery Time C S
Idle A      0            *1             1            1             Y Y
Idle B     *10           *1200         *10           4             Y Y
Idle C      0             6000          6000         50            Y Y
Standby Z   0             9000          9000         120           Y Y

可以看到我的設定是1s的，這個是我方便測試看是否能進入到省電B模式設定的1s的，實際按照我們自己的設計是60s的

查詢當前磁碟的省電狀態的命令

./SeaChest_PowerControl_1100_11923_64 -d /dev/sdp  --checkPowerMode;
[root@node120 ~]# ./SeaChest_PowerControl_1100_11923_64 -d /dev/sdp  --checkPowerMode;
==========================================================================================
 SeaChest_PowerControl - Seagate drive utilities - NVMe Enabled
 Copyright (c) 2014-2019 Seagate Technology LLC and/or its Affiliates, All Rights Reserved
 SeaChest_PowerControl Version: 1.10.0-1_19_23 X86_64
 Build Date: Jun 10 2019
 Today: Mon Aug 24 10:54:49 2020
==========================================================================================

/dev/sg17 - ST10000NM0016-1TT101 - ZA2CRY9G - ATA
Device is in the PM1: Idle state and the device is in the Idle_b power condition


[root@node120 ~]# ./SeaChest_PowerControl_1100_11923_64 -d /dev/sdp  --checkPowerMode;
==========================================================================================
 SeaChest_PowerControl - Seagate drive utilities - NVMe Enabled
 Copyright (c) 2014-2019 Seagate Technology LLC and/or its Affiliates, All Rights Reserved
 SeaChest_PowerControl Version: 1.10.0-1_19_23 X86_64
 Build Date: Jun 10 2019
 Today: Mon Aug 24 10:55:04 2020
==========================================================================================

/dev/sg17 - ST10000NM0016-1TT101 - ZA2CRY9G - ATA
Device is in the PM0: Active state or PM1: Idle State

在省電模式的提示是

Device is in the PM1: Idle state and the device is in the Idle_b power condition

磁碟正在執行的模式是

Device is in the PM0: Active state or PM1: Idle State

注意，這個命令

./SeaChest_PowerControl_1100_11923_64 -d /dev/sdp --showEPCSettings

會喚醒磁碟也就是中斷了省電模式，所以只有確定知曉會中斷省電模式的時候才使用

管理平臺不要頻繁呼叫

如果需要檢查當前模式就用上面的checkPowerMode命令，checkPowerMode命令不會喚醒磁碟，並且需要注意是否有本地的意外程序把磁碟省電模式中斷了