Re: [請益] 基本的MLC與TLC比較問題
※ 引述《virgil00 (不用楔)》之銘言:
: 標題: [請益] 基本的MLC與TLC比較問題
: 時間: Sun Jun 5 16:08:01 2016
:
: 比較MLC與TLC兩者
: MLC速度較快、壽命較長
: TLC則是成本較低、單位儲存資料較多
: 如果壽命較短速度較慢大家還是選擇TLC嗎?
: 小弟有點怕短命的...
我最近也在思考這問題, 是否真有必要一定得買MLC?
TLC SSD, 寫入1000次, 120GB 約可寫入120TB
每日寫10GB, 一年寫4TB, 120TB可用30年
每日寫30GB, 一年寫12TB, 120TB可用10年
240TB(240GB)可用20年, 480TB(480GB)可用40年
MLC SSD, 寫入3000次, 120GB 約可寫入360TB
每日寫30GB, 一年寫12TB, 360TB可用30年
每日寫100GB, 一年寫36.5TB, 360TB可用10年
720TB(240GB)可用20年, 1440TB(480GB)可用40年
一般人我猜平均每日寫入在 10GB~30GB......TLC 綽綽有餘
少數人平均每日寫入100GB......可能才需 MLC, 或是 480GB TLC SSD
不知我的想法有沒有盲點?(不考慮極端寫入速度的話)
--
行車紀錄器記憶卡好像也是差不多:
TLC 寫入1000次, 64GB 約可寫入64TB
720p 每日寫2hr = 8GB, 64TB可用22年
1080p 每日寫2hr = 16GB, 64TB可用11年
大概剩24hr不間斷監視器需要用到MLC:
MLC 寫入3000次, 64GB 約可寫入192TB
720p 每日寫24hr = 96GB, 192TB可用5年
1080p 每日寫24hr = 192GB, 192TB可用2.5年
720p 每日寫24hr = 96GB, 384TB(128GB)可用10年
1080p 每日寫24hr = 192GB, 384TB(128GB)可用5年
1080p 每日寫24hr = 192GB, 768TB(256GB)可用10年
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※ 發信站: 批踢踢實業坊(ptt.cc)
※ 文章網址: https://www.ptt.cc/bbs/Storage_Zone/M.1481696437.A.AEA.html
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瀏覽器一天10GB, 那表示網路每月用300GB以上,
我家固網平均每月用量在40GB~60GB,
會用到300GB甚至幾TB幾十TB, 算重度使用者吧?
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這是因為 MLC 和 TLC 的價差太小,
如果 TLC 只要 MLC 的半價或六折,
你還是堅持 MLC ?
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這方法好像不錯...
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一般情況不都是 4,500MB/s 在讀寫?
除非掉到 HDD 100MB/s 那才會有差.
MX300 750GB $3,888~$3,999 $5.3/GB
未來 240GB TLC SSD 應該有機會掉到 1,500~1,600 一顆
耐用性應該也不會差 120GB MLC SSD 多少...
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有一種說法是:
TLC被人詬病的是價格, 而不是效能.
(效能其實是假議題, 畢竟能把顆粒操掛的人是少數...)
※ 編輯: domain (36.232.151.250), 12/15/2016 13:41:25
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