写这个blog的目的是因为遇到了很多客户，从我们这里买了磁盘，然后更换后，只要不是HEALTHY的状态，就说磁盘有问题，然后要求退货，或者直接就退货了，等问工程师，当时磁盘是什么状态的时候，他的回答往往是不识别、不同步等等博大精深的根本无法知道磁盘到底什么状态的答案。
很多二把刀头脑中，磁盘只有两个状态，正常和故障，在isilon系统中，正常就是HEALTHY，翻译过来就是健康的意思，其他统统就是故障。其实任何的智能存储系统，磁盘都有很多的状态，每个状态代表了磁盘不同的含义，有了这个状态，才可以往下进一步看如何处理。
下面这个表是isilon的所有磁盘状态定义，看起来有点复杂，后面我会对常见的一些状态做个解释：
| Description 描述 | 如何查看 | Error state | |
| HEALTHY 健康 | All drives in the node are functioning correctly. 这个就不用过多解释了，磁盘工作状态正常 | Command-line interface, web administration interface 命令行或者图形界面查看 | |
| SMARTFAIL?or?Smartfail or restripe in progress 磁盘故障，数据拷贝中 | The drive is in the process of being removed safely from the file system, either because of an I/O error or by user request. Nodes or drives in a smartfail or read-only state affect only write quorum. 磁盘故障了，当然也可以是用户自己触发的，系统开始同步这个磁盘中的数据到其他磁盘 | Command-line interface, web administration interface | |
| NOT AVAILABLE | A drive is unavailable for a variety of reasons. You can click the bay to view detailed information about this condition. Note:?In the web administration interface, this state includes the?ERASE?and?SED_ERROR?command-line interface states. | Command-line interface, web administration interface | X |
| SUSPENDED 挂起 | This state indicates that drive activity is temporarily suspended and the drive is not in use. The state is manually initiated and does not occur during normal cluster activity. | Command-line interface, web administration interface | |
| NOT IN USE 不在使用 | A node in an offline state affects both read and write quorum. | Command-line interface, web administration interface | |
| REPLACE 更换 | The drive was smartfailed successfully and is ready to be replaced. | Command-line interface only | |
| STALLED 失速状态，就是可能磁盘坏了，系统要去再检查磁盘是否正的坏了 | The drive is stalled and undergoing stall evaluation. Stall evaluation is the process of checking drives that are slow or having other issues. Depending on the outcome of the evaluation, the drive may return to service or be smartfailed. This is a transient state. | Command-line interface only | |
| NEW 新磁盘 | The drive is new and blank. This is the state that a drive is in when you run the?isi dev?command with the?-a?add?option. | Command-line interface only | |
| USED 拆机磁盘 | The drive was added and contained an Isilon GUID but the drive is not from this node. This drive likely will be formatted into the cluster. | Command-line interface only | |
| PREPARING 准备中 | The drive is undergoing a format operation. The drive state changes to HEALTHY when the format is successful. | Command-line interface only | |
| EMPTY 空的 | No drive is in this bay. | Command-line interface only | |
| WRONG_TYPE 错误类型 | The drive type is wrong for this node. For example, a non-SED drive in a SED node, SAS instead of the expected SATA drive type. | Command-line interface only | |
| BOOT_DRIVE 系统启动盘 | Unique to the A100 drive, which has boot drives in its bays. | Command-line interface only | |
| SED_ERROR | The drive cannot be acknowledged by the OneFS system. Note:?In the web administration interface, this state is included in?Not available. | Command-line interface, web administration interface | X |
| ERASE | The drive is ready for removal but needs your attention because the data has not been erased. You can erase the drive manually to guarantee that data is removed. Note:?In the web administration interface, this state is included in?Not available. | Command-line interface only | |
| INSECURE | Data on the self-encrypted drive is accessible by unauthorized personnel. Self-encrypting drives should never be used for non-encrypted data purposes. Note:?In the web administration interface, this state is labeled?Unencrypted SED. | Command-line interface only | X |
| UNENCRYPTED SED | Data on the self-encrypted drive is accessible by unauthorized personnel. Self-encrypting drives should never be used for non-encrypted data purposes. Note:?In the command-line interface, this state is labeled?INSECURE. | Web administration interface only | X |
对于最后面的几个状态是关于SED磁盘的，就不特别说明了，说多了，更乱。中国国内很少有客户使用SED磁盘的，少量外企客户使用。
重点几个状态给大家解释下：
今天就分享到这里，上面的状态都是系统正常运行的状态，也有各种异常情况发生，比如smartfail就不动，好几天一点不走，preparingt了好多天也不到正常状态，怎么换盘都是EMPTY等等。具体问题就add wechat at StorageExpert做进一步沟通吧。?