blocks|key|820520|text|检测SSD并不像dseifert所说的那样不可能。linux的libata+(http://linux.derkeiler.com/Mailing-Lists/Kernel/2009-04/msg03625.html)已经有了一些进展，尽管它似乎还没有准备好供用户使用。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|820521|我绝对理解为什么需要这样做。这基本上就是链表和数组之间的区别。在SSD上进行碎片整理通常会适得其反。|820522|entityMap|0|LINK|mutability|MUTABLE|url|http://linux.derkeiler.com/Mailing-Lists/Kernel/2009-04/msg03625.html^0|13|1X|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

Detecting SSDs is not as impossible as dseifert makes out. There is already some progress in linux's libata (<a href="http://linux.derkeiler.com/Mailing-Lists/Kernel/2009-04/msg03625.html" rel="nofollow noreferrer">http://linux.derkeiler.com/Mailing-Lists/Kernel/2009-04/msg03625.html</a>), though it doesn't seem user-ready yet.

And I definitely understand why this needs to be done. It's basically the difference between a linked list and an array. Defragmentation and such is usually counter-productive on a SSD.

blocks|key|820544|text|终于是一个可靠的解决方案了！实际上，其中的两个！|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|820545|检查/sys/block/+sdX+/queue/rotational，其中sdX是驱动器名称。如果它是0，你处理的是SSD，1表示普通的老式硬盘。|820546|我不能确定它是在哪里引入的Linux版本，但它存在于Ubuntu的Linux3.2和vanilla+Linux3.6中，而不存在于vanilla+2.6.38中。甲骨文也将其backported到他们基于2.6.32的牢不可破的企业内核5.5。|820547|还有一个ioctl来检查驱动器是否可以从Linux3.3开始旋转，这是由this+commit引入的。不过，使用sysfs通常更方便。|820548|entityMap|0|LINK|mutability|MUTABLE|url|https://oss.oracle.com/el5/docs/RELEASE-NOTES-U5-en.html|1|https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=ef00f59c95fe6e002e7c6e3663cdea65e253f4cc^0|0|I|0|0|2F|A|0|0|10|B|1|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Y|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|Z|8|@]|D|@$9|10|A|11|1|12]]|E|$]]|$1|J|3|K|5|6|7|13|8|@]|D|@$9|14|A|15|1|16]]|E|$]]|$1|L|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|M|$N|$5|O|P|Q|E|$R|S]]|T|$5|O|P|Q|E|$R|U]]]]

Finally a reliable solution! Two of them, actually!

Check /sys/block/sdX/queue/rotational, where sdX is the drive name. If it's 0, you're dealing with an SSD, and 1 means plain old HDD.

I can't put my finger on the Linux version where it was introduced, but it's present in Ubuntu's Linux 3.2 and in vanilla Linux 3.6 and not present in vanilla 2.6.38. Oracle also <a href="https://oss.oracle.com/el5/docs/RELEASE-NOTES-U5-en.html" rel="noreferrer">backported</a> it to their Unbreakable Enterprise kernel 5.5, which is based on 2.6.32.

There's also an ioctl to check if the drive is rotational since Linux 3.3, introduced by <a href="https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=ef00f59c95fe6e002e7c6e3663cdea65e253f4cc" rel="noreferrer">this commit</a>. Using sysfs is usually more convenient, though.

blocks|key|1273934|text|你可以通过运行|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1273935|smartctl+-i+sda|code-block|syntax|javascript|1273936|来自Smartmontools。几乎所有SSD的型号字段中都有SSD。但不能保证。|offset|length|1273937|entityMap|0|LINK|mutability|MUTABLE|url|http://smartmontools.sourceforge.net/^0|0|0|2|D|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

You could get lucky by running

<pre><code>smartctl -i sda
</code></pre>

from <a href="http://smartmontools.sourceforge.net/" rel="nofollow noreferrer">Smartmontools</a>. Almost all SSDs has SSD in the Model field. No guarantee though.

blocks|key|4038826|text|我的两点意见来回答这个古老但非常重要的问题...如果通过SCSI访问磁盘，那么您将(可能)能够使用SCSI查询命令来请求其转速。VPD+(重要的产品数据)页面被称为Block+Device+Characteristics，并且有一个编号0xB1。此页的字节4和5包含一个数字，其含义为：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4038827|reported"|4038828|0001h+|unordered-list-item|4038829|
|4038830|0000h+"Medium+rotation+rate+is+not+3A98h)"|4038831|4038832|FFFFh“非旋转介质(例如固态)”|4038833|0002h-+0400h+|4038834|0002h-0400h+rpm“以每分钟旋转数(即rpm)为单位的额定介质转速(例如，7200rpm=+1C20h，10000rpm=+2710h，和15000rpm=3A98h)”|4038835|FFFFh“reported”|4038836|0001h“|4038837|4038838|4038839|因此，固态硬盘必须在此字段中具有0001h。可以在here中找到有关此页面的T10.org文档。|4038840|但是，这个标准的实施情况对我来说并不清楚。|4038841|entityMap|0|LINK|mutability|MUTABLE|url|ftp://www.t10.org/t10/document.07/07-203r0.pdf^0|2A|S|3A|4|0|0|0|0|0|0|0|0|0|0|0|0|0|G|5|12|7|P|4|0|0|0^^$0|@$1|2|3|4|5|6|7|1D|8|@$9|1E|A|1F|B|C]|$9|1G|A|1H|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1I|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|1J|8|@]|D|@]|E|$]]|$1|K|3|L|5|6|7|1K|8|@]|D|@]|E|$]]|$1|M|3|N|5|J|7|1L|8|@]|D|@]|E|$]]|$1|O|3|L|5|6|7|1M|8|@]|D|@]|E|$]]|$1|P|3|Q|5|J|7|1N|8|@]|D|@]|E|$]]|$1|R|3|S|5|J|7|1O|8|@]|D|@]|E|$]]|$1|T|3|U|5|J|7|1P|8|@]|D|@]|E|$]]|$1|V|3|W|5|J|7|1Q|8|@]|D|@]|E|$]]|$1|X|3|Y|5|J|7|1R|8|@]|D|@]|E|$]]|$1|Z|3|-4|5|6|7|1S|8|@]|D|@]|E|$]]|$1|10|3|-4|5|6|7|1T|8|@]|D|@]|E|$]]|$1|11|3|12|5|6|7|1U|8|@$9|1V|A|1W|B|C]|$9|1X|A|1Y|B|C]]|D|@$9|1Z|A|20|1|21]]|E|$]]|$1|13|3|14|5|6|7|22|8|@]|D|@]|E|$]]|$1|15|3|-4|5|6|7|23|8|@]|D|@]|E|$]]]|16|$17|$5|18|19|1A|E|$1B|1C]]]]

My two cents to answering this old but very important question... If a disk is accessed via SCSI, then you will (potentially) be able to use SCSI INQUIRY command to request its rotational rate. VPD (Vital Product Data) page for that is called <code>Block Device Characteristics</code> and has a number <code>0xB1</code>. Bytes 4 and 5 of this page contain a number with meaning:

<ul>
<li>0000h "Medium rotation rate is not reported"</li>
<li>0001h "Non-rotating medium (e.g., solid state)"</li>
<li>0002h - 0400h "Reserved"</li>
<li>0401h - FFFEh "Nominal medium rotation rate in rotations per minute (i.e.,
rpm) (e.g., 7 200 rpm = 1C20h, 10 000 rpm = 2710h, and 15 000 rpm = 3A98h)"</li>
<li>FFFFh "Reserved"</li>
</ul>

So, SSD must have <code>0001h</code> in this field. The <code>T10.org</code> document about this page can be found <a href="ftp://www.t10.org/t10/document.07/07-203r0.pdf" rel="nofollow">here</a>.

However, the implementation status of this standard is not clear to me.

blocks|key|1275632|text|我写了以下javascript代码。我需要确定机器是否正在使用SSD驱动器，以及是否为引导驱动器。该解决方案采用MSFT_PhysicalDisk的WMI接口。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1275633|function+main()
{
++++var+retval=+false;
++++//+MediaType+-+0+Unknown,+3+HDD,+4+SSD
++++//+SpindleSpeed+-+-1+has+rotational+speed,+0+has+no+rotational+speed+(SSD)
++++//+DeviceID+-+0+boot+device
++++var+objWMIService+=+GetObject("winmgmts:\\\\.\\root\\Microsoft\\Windows\\Storage");
++++var+colItems+=+objWMIService.ExecQuery("select+*+from+MSFT_PhysicalDisk");++
++++var+enumItems+=+new+Enumerator(colItems);
++++for+(;+!enumItems.atEnd();+enumItems.moveNext())+
++++{
++++++++var+objItem+=+enumItems.item();
++++++++if+(objItem.MediaType+==+4+&&+objItem.SpindleSpeed+==+0)
++++++++{
++++++++++++if+(objItem.DeviceID+==0)
++++++++++++{
++++++++++++++++retval=true;
++++++++++++}
++++++++}
++++}
++++if+(retval)
++++{
++++++++WScript.Echo("You+have+SSD+Drive+and+it+is+your+boot+drive.");
++++}
++++else
++++{
++++++++WScript.Echo("You+do+not+have+SSD+Drive");
++++}
++++return+retval;
}
main();|code-block|syntax|javascript|1275634|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I wrote the following javascript code. I needed to determine if machine was ussing SSD drive and if it was boot drive. The solution uses MSFT_PhysicalDisk WMI interface.

<pre><code>function main()
{
 var retval= false;
 // MediaType - 0 Unknown, 3 HDD, 4 SSD
 // SpindleSpeed - -1 has rotational speed, 0 has no rotational speed (SSD)
 // DeviceID - 0 boot device
 var objWMIService = GetObject("winmgmts:\\\\.\\root\\Microsoft\\Windows\\Storage");
 var colItems = objWMIService.ExecQuery("select * from MSFT_PhysicalDisk"); 
 var enumItems = new Enumerator(colItems);
 for (; !enumItems.atEnd(); enumItems.moveNext()) 
 {
 var objItem = enumItems.item();
 if (objItem.MediaType == 4 &amp;&amp; objItem.SpindleSpeed == 0)
 {
 if (objItem.DeviceID ==0)
 {
 retval=true;
 }
 }
 }
 if (retval)
 {
 WScript.Echo("You have SSD Drive and it is your boot drive.");
 }
 else
 {
 WScript.Echo("You do not have SSD Drive");
 }
 return retval;
}
main();
</code></pre>

blocks|key|820490|text|SSD设备模拟硬盘设备接口，因此它们可以像硬盘一样使用。这也意味着没有通用的方法来检测它们是什么。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|820491|您可能可以使用驱动器的某些特性(延迟、速度、大小)，尽管这并不适用于所有驱动器。另一种可能是查看S.M.A.R.T.数据，看看是否可以通过它确定磁盘类型(通过型号名称，某些值)，但是，除非您保留所有驱动器的数据库，否则这也不会是100%25准确的。|820492|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

SSD devices emulate a hard disk device interface, so they can just be used like hard disks. This also means that there is no general way to detect what they are.

You probably could use some characteristics of the drive (latency, speed, size), though this won't be accurate for all drives. Another possibility may be to look at the S.M.A.R.T. data and see whether you can determine the type of disk through this (by model name, certain values), however unless you keep a database of all drives out there, this is not gonna be 100% accurate either.

blocks|key|4884026|text|写入文本文件|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4884027|读取文本文件|4884028|重复10000次...|4884029|10000/elapsed|offset|length|style|CODE|4884030|对于更高的固态硬盘，python3：|4884031|def+ssd_test():

++++doc+=+'ssd_test.txt'
++++start+=+time.time()
++++for+i+in+range(10000):
++++++++with+open(doc,+'w%2B')+as+f:
++++++++++++f.write('ssd+test')
++++++++++++f.close()
++++++++with+open(doc,+'r')+as+f:
++++++++++++ret+=+f.read()
++++++++++++f.close()
++++stop+=+time.time()
++++elapsed+=+stop+-+start
++++ios+=+int(10000/elapsed)
++++hd+=+'HDD'
++++if+ios+>+6000:+#+ssd>8000;+hdd+<4000
++++++++hd+=+'SSD'
++++print('detecting+hard+drive+type+by+read/write+speed')
++++print('ios',+ios,+'hard+drive+type',+hd)
++++return+hd|code-block|syntax|javascript|4884032|entityMap^0|0|0|0|0|D|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|X|8|@$H|Y|I|Z|J|K]]|9|@]|A|$]]|$1|L|3|M|5|6|7|10|8|@]|9|@]|A|$]]|$1|N|3|O|5|P|7|11|8|@]|9|@]|A|$Q|R]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

write text file 
read text file

repeat 10000 times...

<code>10000/elapsed</code>

for an ssd will be much higher, python3:

<pre><code>def ssd_test():

 doc = 'ssd_test.txt'
 start = time.time()
 for i in range(10000):
 with open(doc, 'w+') as f:
 f.write('ssd test')
 f.close()
 with open(doc, 'r') as f:
 ret = f.read()
 f.close()
 stop = time.time()
 elapsed = stop - start
 ios = int(10000/elapsed)
 hd = 'HDD'
 if ios &gt; 6000: # ssd&gt;8000; hdd &lt;4000
 hd = 'SSD'
 print('detecting hard drive type by read/write speed')
 print('ios', ios, 'hard drive type', hd)
 return hd
</code></pre>

I'm getting ready to release a tool that is only effective with regular hard drives, not SSD (solid state drive). In fact, it shouldn't be used with SSD's because it will result in a lot of read/writes with no real effectiveness.

Anyone knows of a way of detecting if a given drive is solid-state?

Is there any way of detecting if a drive is a SSD?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我准备发布一个只对普通硬盘有效的工具，而不是SSD (固态硬盘)。事实上，它不应该与SSD一起使用，因为它会导致大量的读/写，而没有真正的有效性。有谁知道一种检测给定驱动器是否为固态硬盘的方法？

问有没有办法检测硬盘是否是固态硬盘？
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回答 7

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问有没有办法检测硬盘是否是固态硬盘？EN

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问有没有办法检测硬盘是否是固态硬盘？
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