Interesting results, but I think I know why

  • SpinRite v6.1 Release #3
    Guest:
    The 3rd release of SpinRite v6.1 is published and may be obtained by all SpinRite v6.0 owners at the SpinRite v6.1 Pre-Release page. (SpinRite will shortly be officially updated to v6.1 so this page will be renamed.) The primary new feature, and the reason for this release, was the discovery of memory problems in some systems that were affecting SpinRite's operation. So SpinRite now incorporates a built-in test of the system's memory. For the full story, please see this page in the "Pre-Release Announcements & Feedback" forum.
    /Steve.
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  • BootAble – FreeDOS boot testing freeware

    To obtain direct, low-level access to a system's mass storage drives, SpinRite runs under a GRC-customized version of FreeDOS which has been modified to add compatibility with all file systems. In order to run SpinRite it must first be possible to boot FreeDOS.

    GRC's “BootAble” freeware allows anyone to easily create BIOS-bootable media in order to workout and confirm the details of getting a machine to boot FreeDOS through a BIOS. Once the means of doing that has been determined, the media created by SpinRite can be booted and run in the same way.

    The participants here, who have taken the time to share their knowledge and experience, their successes and some frustrations with booting their computers into FreeDOS, have created a valuable knowledgebase which will benefit everyone who follows.

    You may click on the image to the right to obtain your own copy of BootAble. Then use the knowledge and experience documented here to boot your computer(s) into FreeDOS. And please do not hesitate to ask questions – nowhere else can better answers be found.

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dougsnell

New member
Dec 30, 2020
2
0
I figured I should run ReadSpeed on my main system (just a laptop that runs a browser with 100 tabs all day), just to see where the slow spots were. I don't really have any performance issue from a user-experience perspective, but I figured it wasn't in tip-top shape as I haven't run SpinRite on the drive since I put it into production. After the first pass, I decided to run with a /1 to get more granular, and in the process I figured out what was likely going on.

I didn't expect what I saw, and as I thought about my unique circumstances, I got a chuckle out of it and figured I'd put out the results directly into my post. I don't know if that's a horrible idea, but as a regular listener to Security Now, I figured the people in the forums either like a good puzzle, or they'll skip my message altogether.

My pre-apology if this isn't the normal method of posting, but this is mainly for fun. As Steve likes to say on the podcast, "What could possibly go wrong?"

Code:
Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81  240GB ADATA SP550                   373.4   514.2   171.4   411.0   209.1
---- ----- ---------------------------- ------- ------- ------- ------- -------
                                         405.4   253.1   191.1   542.1    90.6
                                         542.1   228.6   182.0   542.1    46.1
                                         542.1   384.3   367.8   542.1   142.6
                                         537.4   537.4   252.2   537.4    76.5
                                         537.3   537.2   196.6   537.3    67.8
                                         537.4   537.3   388.0   537.3    97.1
                                         537.3   537.3   476.9   537.3   143.4
                                         537.4   537.3   537.4   537.3   131.8
                                         533.5   537.3   500.3   537.3   134.3
                                         441.0   537.3   177.3   537.3   380.0
                                         537.3   537.3   371.1   537.3   439.4
                                         537.4   537.3   331.7   537.3   270.3
                                         517.4   537.3   240.9   537.3   381.6
                                         523.3   537.3   212.3   537.3   165.4
                                         537.3   537.3   162.5   537.3   504.3
                                         537.3   537.3   132.5   537.3   474.1
                                         537.3   537.3   104.3   537.3   499.3
                                         537.4   537.3   174.3   537.3   299.8
                                         537.4   537.2   203.9   537.3   133.2
                                         537.4   537.3   173.8   537.3   129.5
                                         537.4   537.3   339.4   537.3   233.6
                                         537.3   537.3   285.5   537.3   190.1
                                         537.4   537.3   202.6   537.3   352.7
                                         537.4   537.3   180.9   537.3   166.3
                                         537.4   537.3   133.2   537.3   186.2
                                         537.4   537.3   143.0   537.3   496.9
                                         537.4   537.3   240.3   537.3   492.9
                                         537.3   537.3   226.8   537.3   406.5
                                         537.3   537.3   395.0   537.3   437.9
                                         537.4   537.3   395.6   537.3   321.7
                                         357.1   537.3    91.9   537.3   135.8
                                         271.8   537.3    47.1   537.3   133.3
                                         203.8   537.3   126.9   537.3   229.4
                                         265.6   537.3   537.3   537.3   360.6
                                         329.5   537.3   537.3   537.3   334.0
                                         289.7   537.3   537.4   537.3   425.9
                                         334.0   537.3   537.4   537.3   492.1
                                         256.3   537.3   537.4   537.2   337.6
                                         225.1   537.3   184.0   537.4   134.2
                                         234.3   537.3   146.5   537.3   303.2
                                         292.6   537.3   154.0   537.3   306.6
                                         246.6   537.3    74.2   537.3   109.6
                                         175.6   537.3    65.6   537.3    77.6
                                         277.2   537.3    79.6   537.3    88.0
                                         298.9   537.3   161.7   537.3   418.5
                                         241.9   537.3   256.6   537.3   445.7
                                         329.6   537.3   522.1   537.3   435.8
                                         302.9   537.3   523.0   537.3   384.4
                                         305.5   537.3   525.6   537.3   454.3
                                         339.9   537.3   516.5   537.3   463.9
                                         286.8   537.3   193.0   537.3   355.0
                                         348.8   537.3    63.8   537.3   393.3
                                         315.4   537.3    45.3   537.3   351.3
                                         324.2   537.3   525.2    91.9   373.6
                                         346.4   537.3   501.5    92.0   412.7
                                         401.7   537.3   153.2   252.5   451.8
                                         297.7   537.3    95.9   537.2   408.3
                                         404.5   537.3    91.0   537.3   345.3
                                         342.8   537.3    87.5   537.3   389.3
                                         275.2   537.3    70.3   537.3   489.6
                                         439.1   537.3   507.7   537.3   474.1
                                         383.2   537.3   453.4    81.5   432.1
                                         362.5   537.3   262.2   198.6   409.7
                                         416.2   537.3   509.0   208.4   374.7

                  Benchmarked: Wednesday, 2020-12-30 at 22:01

I built my laptop initially with a Linux partition and boot manager, then added a Windows 10 partition. That was ... probably over 4 years ago. I ran the drive rather full for quite some time, so I presume the 25% section is the Linux partition I rarely boot into these days. The 75% is probably files in Windows that never change. The first portion I presume is between boot files and temporary (swap) space (I don't reboot often), the 50% is probably the main Windows partition where my browser tab abuse is destroying integrity, and the 100% is probably due to having nearly filled the drive for a long time (I'm down to about 50% utilized now).

I figure I'll be a great candidate for SpinRite 6.1 on level 3, too :)
 
Hi, thanks for posting that, it is indeed a really interesting set of results! :)

Good to see the breakdown of the individual test too. Some really slow spots around the 50% mark!

The slow spots at 100% are also unusual. Well done, impressive work there! :)

Could you do a Level 2 pass of Spinrite and post those results before doing Level 3, please? It does seem that even Level 2 is prompting changes in SSDs, and what's happening is not yet clear. Maybe different drive firmware will do different thins (seems likely!) All data will help!
 
Level 2 with no stated issues. Level 3 from 6.0, or 6.1 (when available - although from the podcast, it sounds like a beta version might be available)?

Benchmark below:

Code:
Driv Size  Drive Identity     Location:    0      25%     50%     75%     100
---- ----- ---------------------------- ------- ------- ------- ------- -------
 81  240GB ADATA SP550                   387.4   503.6   188.1   442.3   239.5
---- ----- ---------------------------- ------- ------- ------- ------- -------
                                         463.4   199.3   208.2   541.9   117.5
                                         541.9   179.0   173.7   541.9    68.4
                                         542.0   344.1   420.3   541.9   160.8
                                         537.2   537.2   269.8   537.2    95.7
                                         537.2   537.1   172.0   537.1    91.6
                                         537.2   537.1   338.9   537.1   110.2
                                         537.2   537.1   505.4   537.1   159.2
                                         537.2   537.1   537.2   537.1   140.7
                                         529.7   537.1   501.2   537.1   157.5
                                         500.9   537.1   171.6   537.1   403.4
                                         537.2   537.1   375.9   537.1   443.7
                                         537.2   537.1   318.8   537.1   237.2
                                         526.3   537.1   231.3   537.1   379.1
                                         526.5   537.1   173.8   537.1   201.7
                                         537.2   537.1   143.5   537.1   505.5
                                         537.2   537.2   110.8   537.1   464.9
                                         537.1   537.1    96.8   537.1   491.2
                                         537.2   537.1   158.5   537.1   318.9
                                         537.2   537.1   165.0   537.1   170.7
                                         537.2   537.1   149.1   537.1   154.2
                                         537.1   537.1   392.4   537.1   282.9
                                         537.2   537.1   272.1   537.1   255.1
                                         537.2   537.1   189.9   537.1   401.9
                                         537.2   537.1   152.8   537.1   207.4
                                         537.2   537.1   113.6   537.1   220.7
                                         537.2   537.1   124.2   537.1   480.8
                                         537.2   537.1   237.4   537.1   502.8
                                         537.2   537.1   201.5   537.2   442.3
                                         537.2   537.1   387.0   537.1   467.6
                                         537.2   537.1   376.4   537.1   373.0
                                         404.4   537.1   110.5   537.1   170.4
                                         276.7   537.2    58.1   537.1   173.0
                                         208.7   537.1   156.6   537.2   264.3
                                         248.0   537.1   537.2   537.1   394.9
                                         316.7   537.1   537.1   537.1   317.5
                                         306.2   537.1   537.2   537.1   488.2
                                         332.4   537.1   537.1   537.1   495.6
                                         288.0   537.1   537.2   537.1   367.9
                                         229.4   537.1   322.5   537.1   144.8
                                         263.2   537.1   170.5   537.1   337.2
                                         317.5   537.1   213.7   537.1   333.9
                                         277.6   537.1    91.0   537.1   125.7
                                         229.2   537.1    80.5   537.1    93.1
                                         290.6   537.1    96.3   537.1    97.2
                                         327.3   537.1   156.5   537.1   425.3
                                         277.6   537.1   226.5   537.1   447.7
                                         348.5   537.1   521.7   537.1   455.3
                                         329.2   537.1   522.7   537.1   361.3
                                         298.3   537.1   525.4   537.1   442.1
                                         346.3   537.1   515.1   537.1   461.3
                                         322.3   537.1   284.2   537.1   349.5
                                         354.5   537.1    74.1   537.1   410.9
                                         330.0   537.1    52.6   537.1   368.2
                                         351.4   537.1   526.2   118.4   360.5
                                         336.0   537.1   511.1   109.2   405.7
                                         391.1   537.1   211.7   342.2   443.2
                                         302.8   537.1   158.3   537.0   425.8
                                         358.8   537.1   139.1   537.1   336.4
                                         351.4   537.1   135.0   537.1   382.4
                                         315.7   537.1   109.9   537.1   491.9
                                         427.1   537.1   502.6   537.1   478.7
                                         364.0   537.1   447.7   114.8   429.8
                                         372.4   537.1   250.4   234.8   379.8
                                         428.9   537.1   508.8   305.2   355.4

                  Benchmarked: Wednesday, 2021-01-06 at 12:20