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本帖最后由 per1-q1222 于 2011-2-14 17:52 编辑
這些對答也適用在早期的LSISAS1068/E和1064/E....以下是相關回答...保留原文回答..
翻譯怕避免混淆原意...引起誤會....!!
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per1-q1222:
我最近取得了兩張RAID卡,一張是9211另一張則是9240..
我測試了這兩張...
發現有些地方不太一樣..
例如像中斷數量操作...
上一次你告訴我9240是一款軟件RAID...
所以對9240來說,內置處理器是沒有在運作的?
他跟固件模式有關係嗎?
我猜9211是運作在硬件RAID下...
因為IR/IT模式下, 內置處理器可能會運作並且不支持任何高階RAID模式...
LSI工程師-M氏:
The 9211-series IR HBAs are all software RAID, as is the 9240. LSI hardware RAID controllers are the 87xx series, the 88xx series, and 9260 series, and the 9280 series.
The design, firmware stack, driver family, and every aspect of these boards is completely different. They are in no way similar, with the exception that there are not hardware RAID.
The 9240 does not have an ROC chip.
per1-q1222:
感謝你的回答
所以內置處理器真的和RAID操作沒有任何關係?
內置處理器只用來輔助一般I/O操作, 例如像中斷處理?
換句話說, 不管在哪個固件模式下, 內置處理器依然可以被啟用並且減少CPU負載和降低I/O中斷操作數量?
我實在感到很疑惑, 內置處理器到底能做些甚麼事情?
數據條帶操作?一致性檢查?I/O操作?還是RAID重建和復原?
LSI工程師-M氏:
The I/O processor processes I/O. You need a RAID on chip (ROC) processor for hardware RAID. The software RAID controller you are using do not have ROC chips.
Software RAID controllers utilize the system processor to process I/O because they do not utilize ROC chips.
The ROC chip allows all processing to be offset to the RAID controller, not the system processor. Firmware handles striping, consistency checks, I/O, rebuild, recovery
per1-q1222:
感謝你的回答..
但是根據你們的LSI官方文件記載...
LSISAS2008有一顆內置處理器-PPC440@533MHz..
那麼他沒運作還是有運作?
LSI工程師-M氏:
It is not a ROC chip.
per1-q1222:
我知道他不是一顆ROC晶片..
但是根據你們以下連結內容:
http://www.lsi.com/storage_home/products_home/standard_product_ics/sas_ics/lsisas2008/index.html
High Performance IOP
- PowerPC 440 @ 533MHz
他真的有運作?啟動還是關閉?
我感到很疑惑呢...
LSI工程師-M氏:
I do not understand your question. This is not an ROC chip, therefore this is not a hardware RAID controller. All boards require silicon to process I/O. What are you attempting to determine?
(我:暈倒...)
per1-q1222:
Ok, 對於LSISAS2008晶片來說, 不管哪個固件模式下, 我只想確認內置處理器是否有良好運作?
你知道我想表達的意思嗎?
LSI工程師-M氏:
Yes, the processor does function. It is simply not hardware RAID.
per1-q1222:
感謝..
這就是我想要的一個答案..
所以對於硬件RAID來說, 他不是決定的一個要素?
我通常稱他為內置處理器...
內置處理器只用於處理I/O或著代碼操作嗎?例如中斷處哩,流量控制,或著ROM裡面的固件微帶碼操作?
他跟RAID操作無關對吧?
LSI工程師-K氏;M氏下班了:
I do not understand your question. We have stated which products are hardware RAID and which are not. Is there some way we may further assist?
per1-q1222:
Okay..
根據你們的官方文件記載:
http://www.lsi.com/DistributionSystem/User/AssetMgr.aspx?asset=52971
LSISAS2008有一顆內置處理器-PPC440@533MHz..
我通常稱他為內置處理器...
不管在哪個固件模式下, 例如IR/IT或著MR模式, 他是良好運作的...
對於硬件RAID來說, 他不是決定的一個要素?
你們的M工程師已經告訴我全部LSISAS2008產品都是軟件RAID..
所以, 內置處理器只用於輔助I/O或著代碼操作, 例如中斷處哩,流量控制,或著ROM裡面的固件微帶碼操作?
他跟RAID操作無關對吧?
LSI工程師-K氏:
The Engineer you spoke with, Michaela, is correct. All 2008 based products are software RAID. Is there any way we may be of further assistance?
per1-q1222:
那內置處理器呢?
內置處理器用來輔助I/O或著代碼操作嗎?
他跟RAID操作無關是嗎?
LSI工程師-K氏:
All 2008 based boards are software RAID. Is there any way we may be of further assistance?
(我:fuxk...)
per1-q1222:
我很抱歉..
這不是我想要的答覆...
你確實非常清楚告訴我全部LSISAS2008產品都是軟件RAID..
而且我測過兩張RAID卡了...
9211和9240...
他們有些不同的地方..
例如像中段操作數量...
起初, 我認為9211是硬件RAID,而9240則不是...
但是你們的M氏工程師告訴我:
The design, firmware stack, driver family, and every aspect of these boards is completely different. They are in no way similar, with the exception that there are not hardware RAID.
我接受這個論點..
但我只想確定內置處理器是否有良好運作??
你知道我的意思嗎?
LSI工程師-K氏:
We are unable to divulge the specific internal workings of our hardware as they are proprietary to our code and our code structure.
per1-q1222:
OK..我接受這一點..
這是你們的IP...
感謝你的回答...
另外我還想問另一個問題...
你們有計畫要推出Maintenance-free backup unit (Flash-based)的產品嗎?
我看過以下的連結內容:
http://www.intelraid.com/uploads/RAID_Product_Matrix.pdf
Intel RAID Controller RS2VB080......
像這張???
LSI工程師-K氏:
We do not have Pro-Aduct like this currently available in our DAS line, but there are plans for this in a future release. Unfortunately, no date is currently available for this release.
per1-q1222:
Okay, 感謝您的回覆...
我現在非常清楚一些想法...
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2011/02/14 Updated
per1-q1222:
我實在不清楚為何你的回答如此保守?
答案應該可以更簡單, 更公開...
也許, 不需要牽扯到機密或著IP, 對吧?
根據你的回答, 你們的產品文件文存在疑點...
例如...
http://www.lsi.com/storage_home/products_home/internal_raid/megaraid_sas/entry_line/megaraid_sas_9240-8i/index.html
你說過" all sas2008-based products are software raid "
但是, 然而, 你們官方內容卻說明9240是硬件RAID...
這將會使客戶感到困惑的...
到底哪邊是正確的呢?
老實講, 我實在無法確定...
LSI工程師-B氏:
As mentioned previously, the 9240 is a software RAID controller, a cacheless RAID solution which uses the motherboards system resources (specifically the RAM) for RAID operations.
per1-q1222:
2MB Context RAM是甚麼用途??作為read cache或著write cache???
LSI工程師-B氏:
This is used for processes internal to the chip and not for read or write cache.
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