剛剛買的美光 M500 120G的SSD用Hard Disk Sentinel 檢測健康只有88%

剛買的M500

在灌完win7以及一些工作上需要的軟體之後

安裝Hard disk sentinel來檢查硬碟的狀況

結果Health只有88%

原因如下

The drive tried to examine and reallocate data sector(s) 20 times.
The examined data area is perfect.
At this point, warranty replacement of the disk is not yet possible,
only if the health drops further.
It is recommended to examine the log of the disk regularly.
All new problems found will be logged there.
The TRIM feature of the SSD is supported and enabled for optimal performance.

大概的意思是說這個硬碟企圖檢查與重新分配 sectors 20次，雖然沒有立即更換的必要，
但是隨時注意硬碟的log，是否有新的問題發生

這正常嗎???

我有另外一顆M4使用相同的軟體檢查是沒有出現這個訊息的

麻煩大家解惑一下