[記憶卡] Lexar 512G micro sd 有unallocated partition?

foggie

新卡買返黎 (made in korea)
係disk manager 度見到佢有兩個partition
一個係32M unallocated
一個係460G

之前買左同一張卡 (made in taiwan)
都有係32M unallocated
但因為壞卡所以換過張made in korea既
所以應該真係原廠出黎已經係咁

有冇人知點解會咁？

foggie

https://forums.sandisk.com/t5/Al ... eme-PRO/td-p/368300

呢度都有講，但都係唔知點解。
第一張卡唔知係咪我手多搞過個unallocated partition 所以壞左？

kcyipgar

唔好delete佢，喺好多年前，大約出到最大容量32GB時，我已經發現其他牌子microSD有個隱藏partition，出廠時已經有。

via HKEPC Reader for Android

foggie

岩岩clone 舊卡去新卡
個software delete 左原廠個partition (即係有左個32M unallocated space)
宜家新build 返個partition
1M alignment 128k cluster (我記得原廠好似係256k??不過check 左performance 唔覺有乜分別)
用atto check 左無乜異樣