Interesting results, but I think I know why

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dougsnell

New member
Dec 30, 2020
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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