Btier

src:
http://sourceforge.net/projects/tier/
http://www.lessfs.com/wordpress/
http://searchstorage.techtarget.com/definition/Automated-storage-tiering-AST

Relative term:
Automated storage tiering (AST)


notes:
- a open source for storage tiering

VMWare Disk Transport Method

src:
http://pubs.vmware.com/vsphere-51/index.jsp?topic=%2Fcom.vmware.vddk.pg.doc%2FvddkDataStruct.5.5.html

notes:
14'5/28:
- there are 5 method to access external disk

14'5/28 :
https://drive.google.com/file/d/0B543p5wfySTQTEVuOE1Cc1l0Mms/edit?usp=sharing

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QNAP TS-420 開箱

Src:
http://www.coolaler.com/showthread.php/309602-%E7%B5%82%E6%96%BC%E6%99%89%E5%8D%87%E7%82%BANAS%E4%B8%80%E6%97%8F-QNAP-TS-420-%E9%96%8B%E7%AE%B1

Notes:


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1. 終於晉升為NAS一族 QNAP TS-420 開箱

   上個月月中的時候，不小心逛了某惡魔網站的硬碟板..
   莫名的聽到惡魔的呢喃….
   就這樣出現了一張紙在我手上
   
   
   恩…10.5張小朋友離我遠去了
   
   
   幾天後，有隻大嘴鳥叼著一箱東西來敲我家的門!
   
   
   拆開後突然一股熱淚盈眶，不知道看到東西太開心，還是不自覺的在緬懷那10.5張小朋友…
   
   
   說說為啥買這台的原因好了，之前因為工作需求，有去申辦一些付費的網路空間來使用，但使用久了多多少少都會遇到一些小問題 (速率不穩定、檔案整理不易，最主要是空間不夠大!)
   因此才會想說直接買一台NAS搭配超大硬碟，不管是工作上使用還是做為家中電腦的檔案中樞，應該都相當方便使用吧!!
   
   
   
   
   
   對了，QNAP是正統的台灣公司喔愛用國貨一下
   
   我再拆!! 左邊那張就是說明書
   對…你沒看錯就是這麼樣的一張紙 (汗
   
   
   
   先來看一下零件包，鎖螺絲的螺絲包、變壓器、兩條網路線還有電源線
   
   
   登登登~~ 本體登場，這種洗鍊的外觀才是王道阿~
   
   側面來一發，帶點鉻色的鋁質外殼
   讚…..(口水)
   
   
   背後也來一張，各式的接頭都藏在這邊，還有一個大風扇幫助散熱 A_A
   
   
   硬碟架要取出其實很方便~~
   
   
   NAS都送來了，那硬碟呢?
   正處於月底狀態的情況，逼不得以只好打破小豬撲滿東湊西湊生出了一顆硬碟…
   這顆可是花了我將近6張小朋友才入手的，可是CP值頗高阿
   
   當初在選購4TB NAS硬碟時，參考了一下網友的分享
   
   這篇剛好有測到WD紅標跟Seagate 4TB NAS的效能，結果Seagate勝出不少項目
   在同樣的賣價下，就挑了效能比較好的這顆
   
   6張小朋友換來的神器~超級登場!!
   
   
   看不清楚嗎 ? 我們拉近一點看看
   
   
   Seagate NAS HDD 4TB (ST4000VN000)我想這一顆應該足以抵好幾顆了吧 (荷包阿~)
   
   
   
   大家不要小看這顆硬碟喔!! 他可是QNAP官方有認證過的!!!!
   而且Seagate NAS HDD 4TB有三年全保的保固，萬一真的不幸要送修
   也不用擔心有額外費用的問題~~
   
   
   組裝組裝!!!
   
   把該裝的線材、硬碟都上機之後，就可以開始準備啟動NAS了!!
   
   
   現在NAS設定都是相當簡單的 (時代真的變囉)
   
   
   只要線材有接對，快速安裝軟體基本上都抓得到
   
   
   78分鐘!!! (吐血)
   沒有啦!!! 實際上大約只需要30分鐘左右
   
   
   安裝完就可以利用瀏覽器登入囉A_A
   
   
   主要介面真的好像APPXE XDDD
   
   
   雖然目前使用的時間還不長，但我已經可以感受到NAS的方便性了!! QNAP官方有提供各種應用軟體可以下載，而且光是一種分類就有好幾種可以使用，絕對可以滿足大多數人的使用需求，我自己最需要用到的檔案管理和下載功能都有找到合適的程式，真是太方便了!!!
   
   以上一些開箱及心得 分享給大家 感謝收看

ATA(SATA) protocol introduction

Src :
http://www.serialtek.com/sata_protocol_overview.asp (15'1/20 : NA)

Ref:
http://www.youtube.com/watch?feature=player_embedded&v=586wy4G0-1Q (SATA Introduction)
http://www.youtube.com/watch?feature=player_embedded&v=jFOmiLtYSLg (SATA Frame)

Book:

- The Essential Guide to Serial ATA and SATA Express (available in Google Ebook)

https://books.google.com.tw/books?id=PqvNBQAAQBAJ&printsec=frontcover&hl=zh-TW#v=onepage&q&f=false



Notes:

SATA's protocol :

- Link Layer - Primitives, out of Band (OOB) Signalling)

- Packet Layer - Frame Information Structures (FISes)

- Application/Command Layer - ATA Commands.

Link Layer:

- Primitives

Primitives are primarily used to start/stop/request data.

ALIGN – Sent to align activities between hosts and devices. Must be sent every 256 DWORDs

SYNC – Synchronize

X_RDY – Product is ready to start transmitting a frame

R_RDY – Product is ready to start receiving a frame

R_IP –  Product is receiving the frame

WTRM – Product has finished sending the frame and is waiting to terminate the connection

R_OK – Product has received the frame and it’s CRC is good

R_ERR – Product has received the frame and it’s CRC is bad

SOF – Start of Frame

EOF – End of Frame. DWORD previous to EOF is the CRC value

HOLD – Product not ready to send/receive additional data

HOLDA – Product acknowledges that other product needs time to “catch up”

CONT – “Continues” previous primitive until a different one is sent. Used to reduce EMI.
PMREQ_S – Interface Power Management Request for Slumber
PMREQ_P – Interface Power Management Request for Partial
PMACK – Power Management Request Acknowledged (approved)
PMNAK – Power Management Request Not Acknowledged (denied)
DMAT – Sent to terminate a DMA transmission

- Out Of Band Singaling (OOB) / Speed Negotiation

OOB, Out of Band, is a signaling pattern of either ALIGN primitives or DWORDs consisting of D24.3 characters and idle time used to initialize the SATA interface. There are three kinds of OOB signals used in SATA:

COMINIT – Used by the device to request a communication initialization
COMRESET – Used by the host to force a hardware reset on the device
COMWAKE – Used by either the host or device to signal the PHY layer to wake up.

Below is a diagram showing how speed negotiation is achieved.

1.Host sends COMREST. 2.Device sees COMRESET, sends COMINIT 3.Host sees COMINIT, sends COMWAKE 4.Device sees COMWAKE, sends ALIGN primitives at highest supported speed 5.Host sends D10.2 at 1.5Gps as clock reference, sees ALIGNs and sends ALIGNs 6.Host and device send SYNC primitives