DELL H700使用CacheCade的問題, 答案揭曉了....
 

為了這個問題..
在DELL網站查了老半天...

http://support.dell.com/support/edo...omss/ecache.htm

CacheCade is used to improve random read performance of the Hard Disk Drive (HDD) based Virtual Disks. A solid-state drive (SSD) is a data storage device that uses solid-state memory to store persistent data. SSDs significantly increase the I/O performance (IOPS) and/or write speed in Mbps from a storage device. With Dell Storage Controllers, you can create a CacheCade using SSDs. The CacheCade is then used for better performance of the storage I/O operations. Use either Serial Attached SCSI (SAS) or Serial Advanced Technology Attachment (SATA)SSDs to create a CacheCade.

Create a CacheCade with SSDs in the following scenarios:
Maximum application performance—Create a CacheCade using SSDs to achieve higher performance without wasted capacity.
Maximum application performance and higher capacity—Create a CacheCade using SSDs to balance the capacity of the CacheCade with high performance SSDs.

Higher capacity—If you do not have empty slots for additional HDDs, use SSDs and create a CacheCade. This reduces the number of HDDs required and increases application performance.

The CacheCade feature has the following restrictions:
Only SSDs with the proper Dell identifiers can be used to create a CacheCade.
If you create a CacheCade using SSDs, the SSD properties are still retained. At a later point of time, you can use the SSD to create virtual disks.
A CacheCade can contain either SAS drives or SATA drives but not both.
Each SSD in the CacheCade does not have to be of the same size. The CacheCade size is automatically calculated as follows:

CacheCade size =capacity of the smallest SSD * the number of SSDs
The unused portion of SSD is wasted and can not be used as an additional CacheCade or an SSD-based virtual disk.

The total amount of cache pool with a CacheCade is 512 GB. If you create a CacheCade which is larger than 512 GB, the storage controller still uses only 512 GB.

The CacheCade is supported only on Dell PERC H700 and H800 controllers with 1 GB NVRAM and firmware version 7.2 or later.

In a storage enclosure, the total number of logical devices including virtual disks and CacheCade(s) cannot exceed 64.


這根本整死人...
PFK塞到1GB NVC Cache..
DELL的官方PDF文件根本沒講清楚.....:tu:..

vxr兄辛苦了，幸好我買1GB??

The CacheCade is supported only on Dell PERC H700 and H800 controllers with 1 GB NVRAM and firmware version 7.2 or later.

那是不是表示沒有NVC就沒有這些包含CTIO等功能了!?

所以512MB板本的要為自己超渡一下... :think:

我的猜測是這樣的...
高階軟體功能是透過PFK來解鎖提供了...
我認為PFK是作在Cache Memory上..
也就是說...

512MB Cache==>>CTIO
1GB NVC Cache==>CacheCade&CTIO

以上是我的一些猜測..

vxr大大我今天反覆測試應該是512 cache的都沒有這些功能,要不然也不會我開wt比wb差那麼多數據,系統都是最純淨的win7....現在又開回wb ra,另外可否告知哪裡可以購買到NVC?
實在忍不住想試試看有NVC的效果是如何,要不然真辜負了花大錢買的SLC SSD

y拍或露天，店家的話台北市光華的原價屋有賣。
CacheCade看起來是另外拿SSD做快取，這樣不是得多花一顆到多顆拿來做快取，另外H700只能接八個裝置...orz

看了這篇,再看到您以前發的這篇:
DELL H700這張卡根本是在大送禮...
http://www.pcdvd.com.tw/showthread.php?t=914700

老大,下次發文前建議先確認,連我看了你上面的文章都以為H700全部都有支援cachecade了,現在您才知道原來只有1GB有支援 :jolin: 不知道有多少網友已經看了您的文章去買H700 512MB BBU想來試試您說的功能 :jolin: :confused:

這裡算是有很多新手和門外漢的論壇(包括我),網站上稍有資歷和說話帶有肯定語氣的網友大家也就鮮少再去做確認而會選擇相信所謂的"前輩"/"大大",所以以我來說除非我真的持有這個零件加上我真的用過我才會發表言論來批評甚至於推薦它.

不知道您有沒有實際使用過和持有過Dell H700呢 :confused:

H700我用過...
但是官方PDF文件沒有關於他的任何描述...
導致誤會的話在此說聲抱歉..
我也沒辦法聯繫DELL詢問相關問題...
要問他們程序非常麻煩....
就跟我之前問Intel一樣...
真的很麻煩..
還要事先提供一些基本的個人資料..
但是CTIO(FastPath)是有效的....
CacheCade必須是1GB NVC Cache...

eboostr也是類似有cachecade的功能
雖然說開機到執行軟體前的這段不能像硬體般都有加速
但是應該不會差太多吧