KinChungE

As I remember, when I bought the Seagate backup plus (2.5") years ago, the salesperson told me not ...
pc1668 發表於 2021-10-21 10:35

2.5"還好, 4TB上5TB只係4碟變5碟(10面), 同樣1TB per platter (500GB per side)
最怕係D隻碟有一面disable左(e.g. 明明3.5"單碟雙面2TB, 但係整個雙碟3TB出黎, 即係停用左一面)
呢類碟有機會係某一面QC fail左放落去

pc1668

2.5"還好, 4TB上5TB只係4碟變5碟(10面), 同樣1TB per platter (500GB per side)
最怕係D隻碟有一面disabl ...
KinChungE 發表於 2021-10-21 10:42

So, my MG07ACA14TE should be categorized as "normal" specification, right?

KinChungE

So, my MG07ACA14TE should be categorized as "normal" specification, right?
pc1668 發表於 2021-10-21 10:47

冇錯

o2mini

Then which SMART value is my MG07 14TB's Helium Level . It seems 23 and 24 are the status only.

...
pc1668 發表於 2021-10-20 20:59

幫你問咗Toshiba, China. 結果回覆的是喜和香港有限公司



至於如何解讀這兩項數字, 我會再問問的

o2mini

Then which SMART value is my MG07 14TB's Helium Level . It seems 23 and 24 are the status only.

...
pc1668 發表於 2021-10-20 20:59

回覆來了; 答得非常痛快: 阿媽就是女人!


三隻牌字之中; 閥值最高的是Toshiba, 一開跑就最快到終點了

o2mini

之前探查Seagate氦氣盤是否內置氦氣水平檢測器時還遺留尚未解決的問題..."檢測器"身在何方? 在不斷查找下發現一篇WD的專利Method to detect helium leakage from a disk drive文件, 內裡詳細闡述了如何測量氦氣的水平, 由於技術過於高深看到有點頭昏腦脹, 主要是靠 "溫度感測器+電流+阻抗" 之間的關係去量度氦氣水平

A method to detect helium leakage from a disk drive enclosure is disclosed and claimed. A measurement electrical current is passed through a temperature sensor disposed within the disk drive enclosure. A reference electrical resistance corresponds to a reference temperature of the temperature sensor. A heating electrical current is passed through the temperature sensor. A heated electrical resistance of the temperature sensor, corresponding to a heated temperature of the temperature sensor that exceeds the reference temperature by at least 5° C., is determined. A value that corresponds to a quantity of helium within the disk drive enclosure is determined based on the reference electrical resistance and heated electrical resistance.

溫度感測器就藏身於下圖中位置75的地方, 這個位置就是訊號插座接入位的位置

It is preferable in the present context for the temperature sensor 75 to be more sensitive to changes in gas composition than to changes in local gas velocity.

在訊號插座線路膠膜上有三個凸出物; 右邊一粒應該是固定線路膠膜的膠柱, 左邊兩顆其一相信是溫度感測器真身了


下圖就是全球體積最小的溫度感測器

polarhei

回覆 3# SEIKO

如果勁認真，也許我們用回８ＴＢ空氣或１０ＴＢ空氣甚至用大量ＬＴＯ６磁帶

freefdhk

回覆  SEIKO

如果勁認真，也許我們用回８ＴＢ空氣或１０ＴＢ空氣甚至用大量ＬＴＯ６磁帶 ...
polarhei 發表於 2021-10-24 23:53

用緊 4隻 8TB ,  原本諗住買 8隻 18TB 組台新NAS 用 10年+  .  
睇完呢篇 5年就漏氣真係唔敢落手住.  


其實佢漏氣有冇方法入返氣?  
而且普通空氣盤用靚牛配UPS唔過熱咁用10-20年好平常.
如果好似換電話咁每2-5年換一次 , 都幾大工程.

睇返原來係 2017年買既 WD 外置硬碟 ( 16TB MYBOOK DUO ) 原來 入面兩隻8TB 都係 WD80EFAX 氦氣.
避得過 SMR 都避唔過 氦氣 .

KinChungE

用緊 4隻 8TB ,  原本諗住買 8隻 18TB 組台新NAS 用 10年+  .  
睇完呢篇 5年就漏氣真係唔敢落手住.  
:e ...
freefdhk 發表於 2021-10-25 14:04

SMR碟應該用He機會不大
SMR係cut cost做法
He係add cost做法
點解HDD要add cost係因為技術做唔到高密度platter, 唯有用He再放多幾塊Platter

入翻氣俾你都唔會咁做, 維修HDD成本遠遠遠高於買過隻

Hippo

回覆 38# freefdhk

空氣碟用10-20年好平常? 你問過死雞3T, 4T用家未?