{"id":1095,"date":"2014-05-14T16:18:48","date_gmt":"2014-05-14T08:18:48","guid":{"rendered":"http:\/\/www.eumz.com\/?p=1095"},"modified":"2014-05-14T16:18:48","modified_gmt":"2014-05-14T08:18:48","slug":"ultra3-scsi%e4%b8%8eultra160%e3%80%81ultra320","status":"publish","type":"post","link":"https:\/\/www.wxcn.com\/?p=1095","title":{"rendered":"Ultra3 SCSI\u4e0eUltra160\u3001Ultra320"},"content":{"rendered":"

1998\u5e747\u670831\u65e5\uff0cSCSI\u5546\u4e1a\u534f\u4f1a\uff08SCSI Trade Association\uff0cSTA\uff09\u4ee5Ultra3 SCSI\u7684\u540d\u5b57\u6279\u51c6\u4e86SPI-3\uff0c\u4e0eUltra2 SCSI\u76f8\u6bd4\uff0cUltra3 SCSI\u65b0\u589e\u4e865\u4e2a\u4e3b\u8981\u7279\u6027\u3002<\/p>\n

\u53cc\u6cbf\u4f20\u8f93<\/strong>\uff08Double Transition\uff0cDT\uff09\uff1a\u65f6\u949f\u4fe1\u53f7\u4e0a\u5347\u6cbf\u548c\u4e0b\u964d\u6cbf\u90fd\u89e6\u53d1\u6570\u636e\u4f20\u8f93\uff0c\u800c\u4e0d\u662f\u4ee5\u5f80\u7684\u53ea\u5728\u4e00\u7aef\u89e6\u53d1\uff0c\u4ece\u800c\u5728\u65f6\u949f\u9891\u7387\u4e0d\u53d8\u7684\u60c5\u51b5\u4e0b\u5c06\u4f20\u8f93\u901f\u7387\u7ffb\u500d\uff0c\u8fd9\u79cd\u53cc\u6cbf\u89e6\u53d1\u6280\u672f\u4eca\u5929\u5df2\u7ecf\u5e7f\u4e3a\u4eba\u77e5\u2014\u2014DDR\uff08Double Data Rate\uff09\u3002DT\u7684\u5e94\u7528\u8ba9Ultra3 SCSI\u80fd\u591f\u4ee5Ultra2 SCSI\u7684\u65f6\u949f\u9891\u7387\u83b7\u5f97\u4e24\u500d\u7684\u4f20\u8f93\u901f\u7387(160MB\/s\uff0c\u5373Fast 80)\u3002<\/p>\n

CRC<\/strong>\uff08Cyclic Redundancy Check\uff0c\u5faa\u73af\u5197\u4f59\u6821\u9a8c\uff09\uff1a\u5927\u5bb6\u90fd\u5f88\u719f\u6089\u7684\u6280\u672f\uff0c\u4fdd\u8bc1\u9ad8\u901f\u6570\u636e\u4f20\u8f93\u7684\u53ef\u9760\u6027\u3002<\/p>\n

\u57df\u9a8c\u8bc1<\/strong>\uff08Domain Validation\uff09\uff1aSCSI\u5386\u53f2\u4e0a\u4ea7\u751f\u7684\u89c4\u8303\u5f88\u591a\uff0c\u5f7c\u6b64\u4e4b\u95f4\u53c8\u8981\u4fdd\u6301\u517c\u5bb9\uff0c\u56e0\u6b64\u4e00\u6761SCSI\u901a\u9053\u5185\u901f\u5ea6\u89c4\u683c\u4e0d\u540c\u7684\u8bbe\u5907\u5e76\u5b58\u662f\u5f88\u5e38\u89c1\u7684\u4e8b\u60c5\uff0c\u4e8e\u662fSCSI\u9002\u914d\u5668\u5728\u52a0\u7535\u4e4b\u540e\u6240\u8981\u505a\u7684\u7b2c\u4e00\u4ef6\u4e8b\u5c31\u662f\u8f6e\u8be2\u901a\u9053\u5185\u6240\u6709\u8bbe\u5907\u5e76\u8bb0\u5f55\u4e0b\u5b83\u4eec\u5404\u81ea\u58f0\u660e\u652f\u6301\u7684\u6700\u9ad8\u4f20\u8f93\u901f\u7387\uff0c\u7559\u5f85\u4ee5\u540e\u4f7f\u7528\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u88ab\u79f0\u4e3a\u534f\u5546\u3002<\/p>\n

\u534f\u5546\u5b58\u5728\u7684\u95ee\u9898\u662f\u201c\u7eb8\u4e0a\u8c08\u5175\u201d\uff0c\u5373\u83b7\u5f97\u7684\u90fd\u662f\u6807\u79f0\u503c\uff0c\u800c\u6ca1\u6709\u8003\u8651\u5230\u5b9e\u9645\u7684\u7ebf\u8def\u60c5\u51b5\uff0c\u7279\u522b\u662f\u9ad8\u901f\u4fe1\u53f7\u6613\u53d7\u7ebf\u7f06\u8d28\u91cf\u3001\u957f\u5ea6\u548c\u5916\u90e8\u5e72\u6270\u5f71\u54cd\u800c\u8fbe\u4e0d\u5230\u6700\u9ad8\u901f\u7387\uff0c\u5bfc\u81f4\u4f20\u8f93\u51fa\u9519\u3002\u4f5c\u4e3a\u89e3\u51b3\u65b9\u6848\uff0c\u57df\u9a8c\u8bc1\u89c4\u5b9aSCSI\u9002\u914d\u5668\u4ee5\u8bbe\u5907\u58f0\u660e\u7684\u6700\u9ad8\u4f20\u8f93\u901f\u7387\u53d1\u9001\u5199\u8bf7\u6c42\uff0c\u6570\u636e\u5728\u5199\u5165\u8bbe\u5907\u5185\u90e8\u7f13\u5b58\u540e\u518d\u8bfb\u51fa\uff0c\u5982\u679c\u4e8c\u8005\u4e0d\u4e00\u81f4\u5219\u5c06\u4f20\u8f93\u901f\u7387\u964d\u4f4e\u4e00\u6863\u91cd\u590d\u8be5\u8fc7\u7a0b\uff0c\u76f4\u5230\u83b7\u5f97\u5b9e\u9645\u53ef\u7528\u7684\u6700\u9ad8\u4f20\u8f93\u901f\u7387\u3002<\/p>\n

QAS<\/strong>\uff08Quick Arbitration and Selection\uff0c\u5feb\u901f\u4ef2\u88c1\u53ca\u9009\u4e2d\uff09\uff1a\u5f53\u591a\u4e2a\u8bbe\u5907\u4e89\u593a\u603b\u7ebf\u65f6\uff0cSCSI\u9002\u914d\u5668\u901a\u5e38\u6839\u636e\u4f18\u5148\u7ea7\uff08ID\u53f7\uff09\u5206\u914d\u63a7\u5236\u6743\uff0c\u5373\u6240\u8c13\u4ef2\u88c1\u3002\u5728\u4ef2\u88c1\u8fc7\u7a0b\u4e2d\u603b\u7ebf\u4e0a\u6ca1\u6709\u6570\u636e\u6d41\u52a8\uff0c\u8fd9\u79cd\u65f6\u95f4\u5f00\u9500\u964d\u4f4e\u4e86\u603b\u7ebf\u7684\u5229\u7528\u7387\uff0c\u52a0\u5feb\u4ef2\u88c1\u901f\u5ea6\u5219\u53ef\u4ee5\u6539\u5584\u6574\u4e2aSCSI\u5b50\u7cfb\u7edf\u7684\u6027\u80fd\u3002QAS\u91c7\u7528\u4e86\u51cf\u5c11\u4ef2\u88c1\u6b21\u6570\u7684\u65b9\u6cd5\u6765\u505a\u5230\u8fd9\u4e00\u70b9\uff0c\u5373\u7b49\u5f85\u603b\u7ebf\u7684\u8bbe\u5907\u5728\u4e0a\u4e00\u4e2a\u5360\u7528\u8bbe\u5907\u91ca\u653e\u603b\u7ebf\u4e4b\u540e\u7acb\u523b\u593a\u53d6\u63a7\u5236\u6743\uff0c\u800c\u4e0d\u662f\u5f00\u59cb\u65b0\u4e00\u8f6e\u7684\u4ef2\u88c1\u3002\u8fd9\u79cd\u7c7b\u4f3c\u4e8e\u201c\u62a2\u7ebf\u201d\u7684\u65b9\u5f0f\u6bd4\u539f\u6765\u7684\u201c\u8bba\u8d44\u6392\u8f88\u201d\u6709\u4e86\u5f88\u5927\u8fdb\u6b65\uff0c\u4f4e\u4f18\u5148\u7ea7\u7684\u8bbe\u5907\u603b\u662f\u5728\u4ef2\u88c1\u4e2d\u51fa\u5c40\uff08\u5bb9\u6613\u5bfc\u81f4\u201c\u997f\u6b7b\u201d\uff09\u7684\u60c5\u51b5\u5f97\u4ee5\u6539\u89c2\u3002<\/p>\n

\u5c01\u5305\u4f20\u9001<\/strong>\uff08Packetized Transfer\uff0c\u4e5f\u79f0Packetization\u6216Packetized SCSI\uff09\uff1a\u4f20\u7edf\u7684SCSI\u5c06\u547d\u4ee4\u3001\u6570\u636e\u548c\u72b6\u6001\u4fe1\u606f\u5206\u522b\u4f20\u9001\uff0c\u6570\u636e\u4ee5\u6700\u9ad8\u7684\u540c\u6b65\u4f20\u8f93\u901f\u7387\u4f20\u9001\uff08\u8b6c\u5982Ultra2 Wide SCSI\u4e3a80MB\/s\uff09\u662f\u5f88\u6b63\u5e38\u7684\uff0c\u95ee\u9898\u5728\u4e8e\u547d\u4ee4\u548c\u72b6\u6001\u4fe1\u606f\u7684\u4f20\u9001\u901f\u7387\u5c45\u7136\u59cb\u7ec8\u53ea\u6709\u5f02\u6b65\u7684\u533a\u533a5MB\/s\uff01\u4e5f\u5c31\u662f\u8bf4\uff0c\u547d\u4ee4\u548c\u72b6\u6001\u4fe1\u606f\u7684\u65f6\u95f4\u5f00\u9500\u662f\u4e00\u4e2a\u5e38\u91cf\uff0c\u800c\u968f\u7740SCSI\u540c\u6b65\u4f20\u8f93\u901f\u7387\u7684\u4e0d\u65ad\u4e0a\u5347\uff0c\u8fd9\u79cd\u4f20\u8f93\u65b9\u5f0f\u7684\u5f0a\u7aef\u6108\u53d1\u660e\u663e\u2014\u2014\u547d\u4ee4\u548c\u72b6\u6001\u4fe1\u606f\u5f00\u9500\u6240\u5360\u6bd4\u91cd\u8d8a\u6765\u8d8a\u5927\uff0c\u6548\u7387\u8fc5\u901f\u4e0b\u964d\uff0c\u6700\u7ec8\u4f1a\u8ba9\u901f\u5ea6\u89c4\u683c\u7684\u63d0\u9ad8\u5931\u53bb\u5b9e\u9645\u610f\u4e49\u3002<\/p>\n

\u5c01\u5305\u4f20\u9001\u901a\u8fc7\u5c06\u547d\u4ee4\u548c\u72b6\u6001\u4fe1\u606f\u4e0e\u6570\u636e\u4e00\u8d77\u6253\u5305\uff08\u4e5f\u79f0\u4e3a\u4fe1\u606f\u5355\u5143\uff0c\u5373Information Units\uff0cIU\uff09\u4f20\u9001\u7684\u65b9\u5f0f\uff0c\u5927\u5e45\u5ea6\u964d\u4f4e\u4e86\u7531\u547d\u4ee4\u548c\u72b6\u6001\u4fe1\u606f\u4ea7\u751f\u7684\u65f6\u95f4\u5f00\u9500\uff0c\u4e3a\u540c\u6b65\u4f20\u8f93\u901f\u7387\u7684\u8fdb\u4e00\u6b65\u63d0\u9ad8\u521b\u9020\u4e86\u6761\u4ef6\u3002\u6b64\u5916\uff0c\u5c01\u5305\u4f20\u9001\u8fd8\u5141\u8bb8\u591a\u4e2aI\/O\u8fc7\u7a0b\u901a\u8fc7\u5355\u4e2a\u7269\u7406\u8fde\u63a5\u5b8c\u6210\uff0c\u800c\u65e0\u9700\u4e3a\u6bcf\u4e2aI\/O\u8fc7\u7a0b\u5efa\u7acb\/\u65ad\u5f00\u8fde\u63a5\u3002<\/p>\n

\u5728\u589e\u52a0\u65b0\u7279\u6027\u7684\u540c\u65f6\uff0cUltra3 SCSI\uff08SPI-3\uff09\u8fd8\u505a\u4e86\u4e9b\u201c\u6e05\u7406\u95e8\u6237\u201d\u7684\u5de5\u4f5c\u2014\u2014\u5e9f\u5f03\u4e8632\u4f4d\u603b\u7ebf\u5bbd\u5ea6\u548cSCAM\uff08SCSI\u81ea\u52a8\u914d\u7f6e\uff09\u8fd9\u4e24\u4e2a\u4ece\u672a\u771f\u6b63\u5b9e\u73b0\u8fc7\u7684\u7279\u6027\uff0c\u56e0LVD\u7684\u51fa\u73b0\u800c\u4e0d\u518d\u5177\u6709\u610f\u4e49\u7684HVD\uff08\u9ad8\u7535\u538b\u5dee\u52a8\uff09\u88ab\u79fb\u53bb\uff0cNarrow\uff088\u4f4d\uff09\u6a21\u5f0f\u4e5f\u56e0Fast-80\u7684\u51fa\u73b0\u800c\u5f00\u59cb\u6210\u4e3a\u5386\u53f2\u3002<\/p>\n

Ultra3 SCSI\u8fd9\u4e2a\u540d\u5b57\u7684\u7ee7\u627f\u6027\u5f88\u597d\uff0c\u5e94\u8be5\u7b97\u662fSCSI\u5546\u4e1a\u534f\u4f1a\u7684\u4e00\u5927\u8d21\u732e\u3002\u7136\u800c\uff0cSCSI\u5546\u4e1a\u534f\u4f1a\u5c45\u7136\u5141\u8bb8\u5c06\u5b9e\u73b05\u4e2a\u65b0\u589e\u4e3b\u8981\u7279\u6027\u7684\u4efb\u610f\u5b50\u96c6\u7684\u8bbe\u5907\uff08\u5305\u62ec\u9002\u914d\u5668\uff09\u51a0\u4ee5\u201cUltra3 SCSI\u201d\u7684\u540d\u53f7\uff0c\u8fd9\u610f\u5473\u7740\u4e0d\u80fd\u4fdd\u8bc1\u4e24\u4e2a\u201cUltra3 SCSI\u201d\u8bbe\u5907\u62e5\u6709\u540c\u6837\u7684\u7279\u6027\uff01\u5982\u6b64\u4e00\u6765\uff0cUltra3 SCSI\u5c82\u4e0d\u662f\u5f62\u540c\u865a\u8bbe\uff1f<\/p>\n

\u4e3a\u4e86\u907f\u514d\u53ef\u80fd\u7531\u6b64\u5f15\u53d1\u7684\u6df7\u4e71\uff0cAdaptec\u548cFujitsu\uff08\u5bcc\u58eb\u901a\uff09\u3001HP\uff08\u60e0\u666e\uff09\u3001LSI Logic\uff08LSI \u903b\u8f91\uff09\u3001Mylex\u3001QLogic\u3001Quantum\uff08\u6606\u817e\uff09\u8fc5\u901f\u4e8e1998\u5e749\u670814\u65e5\u5171\u540c\u63a8\u51fa\u4e86\u57fa\u4e8eUltra3 SCSI\u7684Ultra 160\/m SCSI\u89c4\u8303\uff0c\u987e\u540d\u601d\u4e49\uff0c\u53cc\u6cbf\u4f20\u8f93\uff08160MB\/s\uff09\u80af\u5b9a\u662f\u91c7\u7528\u4e86\uff0cm\u53d6\u53ef\u7ba1\u7406\u6027\uff08manageability\uff09\u4e4b\u610f\u2014\u2014\u4ee3\u8868CRC\u548c\u57df\u9a8c\u8bc1\uff0c\u81f3\u4e8e\u5b9e\u73b0\u96be\u5ea6\u8f83\u5927\u7684QAS\u548c\u5c01\u5305\u4f20\u9001\u5219\u6ca1\u6709\u5305\u62ec\u5728\u5185\u3002\u53d6\u820d\u5f97\u5f53\u548c\u4f17\u591a\u5382\u5546\u7684\u652f\u6301\u4f7fUltra 160\/m SCSI\u987a\u5229\u5730\u6210\u4e3aUltra3 SCSI\u7684\u6807\u51c6\u5b50\u96c6\uff0c\u5e76\u4ece2000\u5e74\u8d77\u4ee5Ultra160 SCSI\u8fd9\u4e2a\u66f4\u6613\u88ab\u4eba\u63a5\u53d7\u7684\u540d\u5b57\u7edf\u6cbb\u5e02\u573a\u81f3\u4eca\u3002<\/p>\n

\u6839\u636e\u5b58\u50a8\u63a5\u53e3\u4f20\u8f93\u7387\u6bcf\u4e24\u5e74\u5c31\u8981\u7ffb\u756a\u7684\u89c4\u5f8b\uff0cSPI-4\u2014\u2014\u5373Ultra320 SCSI\u57282000\u5e74\u6d6e\u51fa\u6c34\u9762\u4e5f\u5c31\u987a\u7406\u6210\u7ae0\u3002Ultra320\u7ee7\u627f\u4e86Ultra160\u7684\u4e09\u5927\u7279\u6027\uff0c\u5176\u4e2d\u901f\u5ea6\u89c4\u683c\u56e0\u4e3a\u65f6\u949f\u9891\u7387\u7684\u7ffb\u500d\u800c\u63d0\u9ad8\u5230320MB\/s\u3002\u65b0\u7279\u6027\u5f53\u7136\u662f\u4e0d\u53ef\u7f3a\u5c11\u7684\uff1a\u5c01\u5305\u4f20\u9001\u5df2\u6210\u4e3a\u5fc5\u5907\uff0cQAS\u5219\u4ecd\u662f\u53ef\u9009\uff0c\u6b64\u5916\u8fd8\u589e\u52a0\u4e86ISI\uff08Intersymbol Interference Compensation\uff0c\u7801\u95f4\u5e72\u6270\uff09\u8865\u507f\u7b498\u4e2a\u5fc5\u5907\u6216\u53ef\u9009\u9879\uff0c\u89c1\u4e0b\u8868\u3002<\/p>\n

<\/div>\n

\"ultra320\"<\/a><\/a><\/a><\/p>\n

\u6839\u636eIBM\u63d0\u4f9b\u7684\u8d44\u6599\uff0c\u5982\u679c\u8fd8\u4f7f\u7528\u4f20\u7edf\u65b9\u5f0f\uff0cUltra320 SCSI\u7684\u5b9e\u9645\u6570\u636e\u8f93\u51fa\u80fd\u529b\u4e0a\u9650\u4e5f\u5c31\u662f200MB\/s\u5de6\u53f3\uff0c\u4f7f\u7528\u5c01\u5305\u4f20\u9001\u4e4b\u540e\u5219\u53ef\u4ee5\u63d0\u9ad8\u81f3300MB\/s\uff0c\u56e0\u6b64\u8be5\u7279\u6027\u5fc5\u4e0d\u53ef\u5c11\uff1b\u800c\u5bf94KB\u4ee5\u4e0b\u7684\u5c0f\u5757\u6570\u636e\u4f20\u8f93\u6765\u8bf4\uff0c\u4f20\u9001\u547d\u4ee4\u3001\u7b49\u5f85\u4ef2\u88c1\u7b49\u989d\u5916\u5f00\u9500\u5360\u636e\u7684\u6bd4\u4f8b\u5f88\u5927\uff0c\u5728\u524d\u8005\u5df2\u7ecf\u5f97\u5230\u89e3\u51b3\u7684\u60c5\u51b5\u4e0b\uff0cQAS\u7684\u5e94\u7528\u53ef\u4ee5\u8fdb\u4e00\u6b65\u63d0\u9ad8\u6548\u7387\u3002\u65b0\u589e\u76848\u9879\u91cc\u9762\uff0c\u7528\u4e8e\u7ba1\u7406\uff08Flow Control\u548cSCSI bus fairness\uff09\u53ca\u7ea0\u9519\uff08AIP\uff09\u7684\u53ea\u5360\u4e00\u534a\u4e0d\u5230\uff0c\u5176\u4f595\u9879\u5168\u90fd\u4e0e\u6539\u5584\u4f20\u8f93\u8d28\u91cf\u6709\u5173\uff0c\u53ef\u89c1\u968f\u7740\u8fd0\u884c\u9891\u7387\u7684\u6500\u5347\uff0c\u5e76\u884c\u603b\u7ebf\u5df2\u7ecf\u96be\u582a\u5176\u8d1f\u3002<\/p>\n

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1998\u5e747\u670831\u65e5\uff0cSCSI\u5546\u4e1a\u534f\u4f1a\uff08SCSI Trade Association\uff0cSTA\uff09\u4ee5Ultra3 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[254,296,297],"class_list":["post-1095","post","type-post","status-publish","format-standard","hentry","category-pcserver","tag-scsi","tag-ultra3","tag-ultra320"],"_links":{"self":[{"href":"https:\/\/www.wxcn.com\/index.php?rest_route=\/wp\/v2\/posts\/1095","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wxcn.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wxcn.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wxcn.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wxcn.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1095"}],"version-history":[{"count":0,"href":"https:\/\/www.wxcn.com\/index.php?rest_route=\/wp\/v2\/posts\/1095\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wxcn.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1095"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wxcn.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1095"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wxcn.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1095"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}