## page was renamed from furinkan/UsbStickSpeedTesting
Using Crystal Disk Mark 8 Shizuku Edition. Default settings of 5x 1GB test files.

= Sandisk Ultra 32gb =

This is an older model that I've used before. I tried a second run on this stick and... it seems to have incurred an error that makes it unwriteable now :/

Seems like this might be the cause, it's [[https://unix.stackexchange.com/questions/411647/fix-read-only-file-system-usb#comment737857_411647| basically bricked]]. Apparently the drive will go read-only in hardware if it detects a power fluctuation or some sort of error, so it keeps your data safe. :(

 * 2021-10-17
 * Fresh out of packet
 * $13 AUD from JB Hifi
 * USB 3.0

||                       || Read MB/s || Write MB/s ||
|| Sequential 1MiB !Q8T1 || 161.39    || 23.84      ||
|| Sequential 1MiB !Q1T1 || 161.39    || 13.61      ||
|| Random 4KiB !Q32T1    || 7.56      || 0.82       ||
|| Random 4KiB !Q1T1     || 7.51      || 0.31       ||


= Sandisk Cruzer Glide 32gb =

This is a newer model than the Ultra

== Sample 1 ==

 * 2021-10-17
 * Fresh out of packet
 * $11 AUD from JB Hifi
 * USB 3.0

||                       || Read MB/s || Write MB/s ||
|| Sequential 1MiB !Q8T1 || 163.58    || 61.74      ||
|| Sequential 1MiB !Q1T1 || 163.34    || 63.39      ||
|| Random 4KiB !Q32T1    || 9.33      || 3.02       ||
|| Random 4KiB !Q1T1     || 9.25      || 2.72       ||

A retest of this unit showed closely repeatable results, which is good.

== Sample 2 ==

 * 2021-10-20
 * Fresh out of packet
 * $11 AUD from JB Hifi
 * USB 3.0

||                       || Read MB/s || Write MB/s ||
|| Sequential 1MiB !Q8T1 || 160.51    || 59.22      ||
|| Sequential 1MiB !Q1T1 || 158.55    || 62.26      ||
|| Random 4KiB !Q32T1    || 9.19      || 2.79       ||
|| Random 4KiB !Q1T1     || 9.04      || 2.77       ||


= Sandisk Ultra Type-C 32gb =

This one is naturally newer and faster.

 * 2021-10-20
 * Fresh out of packet
 * $19 AUD from JB Hifi
 * USB 3.1 Gen 1
 * Rated up to 150MB/s read

||                       || Read MB/s || Write MB/s ||
|| Sequential 1MiB !Q8T1 || 171.31    || 60.48      ||
|| Sequential 1MiB !Q1T1 || 171.21    || 61.06      ||
|| Random 4KiB !Q32T1    || 8.31      || 0.71       ||
|| Random 4KiB !Q1T1     || 8.23      || 0.70       ||

Retesting immediately after shows the random reads drop to about 4 MB/s, so what's going on there? Obviously this isn't very trustworthy.