SDXC Cards

First tests on a P4B (Raspberry PIOS 32bit)

Later Tests on a P400 (USB booting Raspberry PIOS 64bit on a SSD)

Netac Brand

After writing a 64bit Raspberry PIOS image

trevor@raspiP400gPiOS64:~/usdcard_tools-0.0 $ cat raspiP400gPiOS64_N64GB_cid.log 
raspiP400gPiOS64 sdcard cid status:
RAWCID 8903034e43617264101930291200a100
MID    0x89
OID    0x03 3 ()
PNM    0x4e43617264 (NCard)
PRV    0x10 (1.0)
PSN    0x19302912
RSVD   0x0
MDT    0x0a1 (1/2010)
CRC+1  0x00
trevor@raspiP400gPiOS64:~/usdcard_tools-0.0 $ cat rpdiags_N64GB.txt 
Raspberry Pi Diagnostics - version 0.4
Wed Apr  7 22:42:31 2021

Test : SD Card Speed Test
Run 1
prepare-file;0;0;1184;2
seq-write;0;0;1689;3
rand-4k-write;0;0;373;93
rand-4k-read;3635;908;0;0
Sequential write speed 1689 KB/sec (target 10000) - FAIL
Note that sequential write speed declines over time as a card is used - your card may require reformatting
Random write speed 93 IOPS (target 500) - FAIL
Random read speed 908 IOPS (target 1500) - FAIL
Run 2
prepare-file;0;0;1319;2
seq-write;0;0;3344;6
rand-4k-write;0;0;389;97
rand-4k-read;4204;1051;0;0
Sequential write speed 3344 KB/sec (target 10000) - FAIL
Note that sequential write speed declines over time as a card is used - your card may require reformatting
Random write speed 97 IOPS (target 500) - FAIL
Random read speed 1051 IOPS (target 1500) - FAIL
Run 3
prepare-file;0;0;1792;3
seq-write;0;0;2028;3
rand-4k-write;0;0;419;104
rand-4k-read;3583;895;0;0
Sequential write speed 2028 KB/sec (target 10000) - FAIL
Note that sequential write speed declines over time as a card is used - your card may require reformatting
Random write speed 104 IOPS (target 500) - FAIL
Random read speed 895 IOPS (target 1500) - FAIL
Test FAIL

Transcend Brand

Linux raspiP4B8G-Tr64GB 5.4.51-v8+ #1333 SMP PREEMPT Mon Aug 10 16:58:35 BST 2020 aarch64

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Thu Aug 20 12:59:17 2020
pi@raspiP4B8G-Tr64GB:~ $ cat /sys/block/mmcblk0/device/cid
744a605553445531204284b6d5013c00
pi@raspiP4B8G-Tr64GB:~ $ lsblk
NAME        MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
mmcblk0     179:0    0 57.5G  0 disk
├─mmcblk0p1 179:1    0  256M  0 part /boot
└─mmcblk0p2 179:2    0 57.3G  0 part /
pi@raspiP4B8G-Tr64GB:~ $ cat rpdiags.txt
Raspberry Pi Diagnostics - version 0.4
Wed Apr 21 17:52:33 2021

Test : SD Card Speed Test
Run 1
prepare-file;0;0;18408;35
seq-write;0;0;16371;31
rand-4k-write;0;0;4079;1019
rand-4k-read;15663;3915;0;0
Sequential write speed 16371 KB/sec (target 10000) - PASS
Random write speed 1019 IOPS (target 500) - PASS
Random read speed 3915 IOPS (target 1500) - PASS
Test PASS

---