computer1975

我隻係WD mypassport 4TB，native support trim command，咁佢行咩mode就唔知喇
Wanderer 發表於 2020-5-7 09:36

SATA 新Version 已經加左SMR HDD（當然HDD都要支持呢個新協定）可以用TRIM Free返D位出來，drfgui 用reTRIM通知HDD主動回收空位

原來已經出左  

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computer1975

I have a Seagate 2.5" 4TB (ST4000LM024-2AN17V), a non-stop write of 3TB of data without "窒下窒下" ...
pc1668 發表於 2020-5-7 15:57

你第二段內容肯定是誤導人，使用TRIM和reTRIM 通知隻HDD主動回收空間, 就等如SSD Garbage Collection

舊版SMR抄爆碟，速度回不過來。

新SMR 只由其它HDD抄data過來，跟本可以不用defrag，不過。。。前提是不要要裝得太滿隻HDD （視乎裝什麼大小FILES)

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pc1668

你第二段內容肯定是誤導人，使用TRIM和reTRIM 通知隻HDD主動回收空間, 就等如SSD Garbage Collection

舊版SMR抄爆碟，速度回不過來。

新SMR 只由其它HDD抄data過來，跟本可以不用defrag，不過。。。前提是不要要裝得太滿隻HDD （視乎裝什麼大小FILES)
computer1975 發表於 2020-5-7 17:05

I think my 4TB 2.5" SMR was the so-called "舊版". It doesn't support trim command, I suppose. And I've no idea about those "新版" SMR.

The 2nd paragraph was the actual user experience (3 years of use, no kidding).

1. Day one, read/write speed was 11x/11x MB/s
2. After months of use (with plenty of add/change/delete operations and hdd was nearly full), read/write speed reduced to 6x/6x MB/s
3. quick format the hdd, read/write speed was back to 11x/11x MB/s
4. redo full backup (more than 3TB of data)

I've performed the above steps for more than 10 times during the past 3 years.  

Regarding the point "舊版SMR抄爆碟，速度回不過來", it seems it doesn't apply to my case.  And the "quick format" would always resurrect the hdd.

KinChungE

I think my 4TB 2.5" SMR was the so-called "舊版". It doesn't support trim command, I suppose. And  ...
pc1668 發表於 2020-5-7 17:15

一次過寫入一大堆data係冇問題既
前提係真係純加data
而唔係不停又delete又加
否則速度跌落單位數MB/sec

quick format其實已經足夠還原SMR HDD速度, 唔使理TRIM唔TRIM
TRIM只係用黎改善平時delete file既處理, 減少越用越慢既情況

pc1668

quick format其實已經足夠還原SMR HDD速度, 唔使理TRIM唔TRIM
TRIM只係用黎改善平時delete file既處理, 減少越用越慢既情況
KinChungE 發表於 2020-5-8 09:10

Yes! As mentioned, I've been using 'quick format' to refresh the hdd for years.  As my old version SMR doesn't support TRIM, 'quick format' is the only way to resolve SMR drawback.

Someone mentioned "誤導", may be someone doesn't know that 'quick format' can refresh SMR hdd  

susaad

Agree !!

chiaki1314

睇黎真係唔好買smr 既hd 講真

via HKEPC IR Extreme 4.2.3 - iOS(4.0.2)

harryytm

睇黎真係唔好買smr 既hd 講真

via HKEPC IR Extreme 4.2.3 - iOS(4.0.2)
chiaki1314 發表於 2020-5-8 11:57

1TB 2TB 呢啲細容量 HDD 無錢賺
遲早全部細容量嘅硬碟都係 SMR
無得避

pc1668

1TB 2TB 呢啲細容量 HDD 無錢賺
遲早全部細容量嘅硬碟都係 SMR
無得避
harryytm 發表於 2020-5-8 12:05

If SMR is a matter of concern,  we could go for 1TB/2TB SSD (price drops gradually, it should be more affordable as time goes by).  For large capacity storage, I think HDD is still the king.

whitelove1

HDD health check有無問題?