{"id":9770,"date":"2016-12-15T10:29:24","date_gmt":"2016-12-15T03:29:24","guid":{"rendered":""},"modified":"2024-06-07T16:12:18","modified_gmt":"2024-06-07T09:12:18","slug":"huong-dan-kiem-tra-toc-o-cung-ssd","status":"publish","type":"post","link":"https:\/\/vnso.vn\/en\/huong-dan-kiem-tra-toc-o-cung-ssd\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn ki\u1ec3m tra t\u1ed1c \u0111\u1ed9 \u1ed5 c\u1ee9ng SSD"},"content":{"rendered":"<p style=\"text-align: justify;\"><span style=\"color: #000000;\">G\u1ea7n \u0111\u00e2y VNSO nh\u1eadn \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u ph\u1ea3n h\u1ed3i t\u1eeb kh\u00e1ch h\u00e0ng ph\u00e0n n\u00e0n v\u1ec1 vi\u1ec7c \u1ed5 c\u1ee9ng kh\u00f4ng \u0111\u00fang \u1ed5 SSD. Tuy nhi\u00ean c\u00e1ch \u00a0ki\u1ec3m tra ch\u01b0a \u0111\u00fang.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">\u0110a s\u1ed1 kh\u00e1ch h\u00e0ng s\u1ebd s\u1eed d\u1ee5ng l\u1ec7nh dd \u0111\u1ec3 ki\u1ec3m tra t\u1ed1c \u0111\u1ed9 \u1ed5 c\u1ee9ng, c\u00e2u l\u1ec7nh ph\u1ed5 bi\u1ebfn nh\u01b0 sau:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><!--more--><\/span><\/p>\n<blockquote><p><span style=\"color: #000000;\">dd if=\/dev\/zero of=test bs=64k count=16k conv=fdatasync<\/span><\/p><\/blockquote>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">\u0110\u00e2y l\u00e0 c\u00e2u l\u1ec7nh c\u00f3 s\u1eb5n tr\u00ean h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 \u0111i\u1ec1u h\u00e0nh linux. C\u00e2u l\u1ec7nh s\u1ebd ghi 16000 l\u1ea7n v\u1edbi block size 64k \u0111\u1ec3 t\u1ea1o ra file 1GB. K\u1ebft qu\u1ea3 c\u00f3 th\u1ec3 r\u1ea5t th\u1ea5p, v\u00ed d\u1ee5 30MB\/s. H\u00e3y c\u00f9ng ph\u00e2n t\u00edch c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e2u l\u1ec7nh tr\u00ean:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\">\u0110\u00e2y l\u00e0 1 t\u00ednh tr\u00ecnh \u0111\u1ed9c l\u1eadp(single-threaded), th\u1ef1c hi\u1ec7n ghi tu\u1ea7n t\u1ef1(sequential-write). \u0110\u1ed1i v\u1edbi c\u00e1c d\u1ecbch v\u1ee5 webserver: nginx, apache&#8230; database: \u00a0Mysql, MongoDB, MSSQL server &#8230; d\u1eef li\u1ec7u \u00edt khi n\u00e0o \u0111\u01b0\u1ee3c ghi tu\u1ea7n t\u1ef1 trong 1 th\u1eddi gian d\u00e0i. K\u1ebft qu\u1ea3 ph\u00eda tr\u00ean l\u00e0 v\u00f4 ngh\u0129a.<\/span><\/li>\n<li><span style=\"color: #000000;\">D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c ghi kh\u00e1 nh\u1ecf 1GB. T\u1ed1c \u0111\u1ed9 ghi file d\u1eef li\u1ec7u c\u00f3 th\u1ec3 t\u0103ng l\u00ean b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng t\u00ednh n\u0103ng write-back tr\u00ean RAID server. Khi ghi xu\u1ed1ng l\u1ec7nh s\u1ebd ghi tr\u1ef1c ti\u1ebfp l\u00ean NVRAM(cache) c\u1ee7a card RAID tr\u01b0\u1edbc, sau \u0111\u00f3 th\u00f4ng b\u00e1o cho VPS qu\u00e1 tr\u00ecnh ghi ho\u00e0n t\u1ea5t. Th\u1ef1c t\u1ebf, d\u1eef li\u1ec7u v\u1eabn c\u00f2n n\u1eb1m tr\u00ean NVRAM ch\u01b0a ghi xu\u1ed1ng \u1ed5 c\u1ee9ng ho\u00e0n to\u00e0n.<\/span><\/li>\n<li><span style=\"color: #000000;\">Th\u1eddi gian th\u1ef1c thi qu\u00e1 ng\u1eafn, kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 \u0111\u01b0a ra k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c nh\u1ea5t.<\/span><\/li>\n<li><span style=\"color: #000000;\">Ch\u01b0a ki\u1ec3m tra k\u1ebft qu\u1ea3 ghi.<\/span><\/li>\n<\/ul>\n<h2 style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>1. Ki\u1ec3m tra t\u1ed1c \u0111\u1ed9 IOPS \u1ed5 c\u1ee9ng<\/strong><\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">\u0110\u1ec3 ki\u1ec3m tra k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c nh\u1ea5t, s\u00e1t v\u1edbi th\u1ef1c t\u1ebf khi VPS\/server ch\u1ecbu t\u1ea3i website database, ch\u00fang t\u00f4i \u0111\u1ec1 xu\u1ea5t s\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 fio ki\u1ec3m tra t\u1ed1c \u0111\u1ed9 IOPS(Input\/output per second) &#8211; T\u1ed1c \u0111\u1ed9 \u0111\u1ecdc ghi d\u1eef li\u1ec7u trong 1 gi\u00e2y, c\u00e1ch ki\u1ec3m tra nh\u01b0 sau:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\">Ki\u1ec3m tra \u0111\u1ecdc ng\u1eabu nhi\u00ean(random reads), ghi ng\u1eabu nhi\u00ean(random writes) ho\u1eb7c k\u1ebft h\u1ee3p c\u1ea3 2. D\u1eef li\u1ec7u database th\u01b0\u1eddng ghi ng\u1eabu nhi\u00ean l\u00ean \u1ed5 c\u1ee9ng.<\/span><\/li>\n<li><span style=\"color: #000000;\">Test v\u1edbi block size 4k. Database v\u00e0 nh\u1eefng ch\u01b0\u01a1ng tr\u00ecnh th\u00f4ng th\u01b0\u1eddng \u0111\u1ecdc nh\u1eefng g\u00f3i tin nh\u1ecf 4kb.<\/span><\/li>\n<li><span style=\"color: #000000;\">C\u00e1c website th\u01b0\u1eddng c\u00f3 nhi\u1ec1u ng\u01b0\u1eddi truy c\u1eadp c\u00f9ng 1 l\u00fac \u00a0v\u00ec v\u1eady n\u00ean \u0111o l\u01b0\u1eddng t\u1ed1c \u0111\u1ed9 \u1ed5 c\u1ee9ng v\u1edbi \u0111a ti\u1ebfn tr\u00ecnh(multiple threads) c\u00f9ng 1 th\u1eddi \u0111i\u1ec3m.<\/span><\/li>\n<\/ul>\n<h2 style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>2. C\u00e0i \u0111\u1eb7t FIO<\/strong><\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">C\u00e0i \u0111\u1eb7t FIO tr\u00ean Centos\/Debian\/Ubuntu Server theo c\u00e2u l\u1ec7nh b\u00ean d\u01b0\u1edbi (hi\u1ec7n t\u1ea1i FIO ch\u01b0a h\u1ed7 tr\u1ee3 c\u00e0i \u0111\u1eb7t tr\u00ean h\u1ec7 \u0111i\u1ec1u h\u00e0nh windows):<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">[bash]<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">yum install -y make gcc libaio-devel wget unzip || ( apt-get update &amp;amp;amp;&amp;amp;amp; apt-get install -y make gcc libaio-dev wget unzip &amp;amp;lt;\/dev\/null )<\/span><br \/>\n<span style=\"color: #000000;\">wget https:\/\/github.com\/axboe\/fio\/archive\/master.zip<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">tar xf fio*<\/span><br \/>\n<span style=\"color: #000000;\">cd fio*<\/span><br \/>\n<span style=\"color: #000000;\">make &amp;amp;&amp;amp; make install<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">[\/bash]<\/span><\/p>\n<h2 style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>3. Ki\u1ec3m tra t\u1ed1c \u0111\u1ed9 \u0111\u1ecdc\/ghi<\/strong><\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>C\u1ea5u h\u00ecnh VPS ki\u1ec3m tra:<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">[bash]<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">RAM:2GB<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">CPU:2 core<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">\u1ed5 c\u1ee9ng: 10GB SSD<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">[\/bash]<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Th\u1ef1c thi c\u00e2u l\u1ec7nh b\u00ean d\u01b0\u1edbi:<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">[bash]<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">cd \/root<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">fio &#8211;randrepeat=1 &#8211;ioengine=libaio &#8211;direct=1 &#8211;gtod_reduce=1 &#8211;name=vnsotest &#8211;filename=vnsotest &#8211;bs=4k &#8211;iodepth=64 &#8211;size=4G &#8211;readwrite=randrw &#8211;rwmixread=75<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">[\/bash]<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">C\u00e2u l\u1ec7nh s\u1ebd t\u1ea1o ra file 4GB, m\u1ed7i m\u1eabu tin 4KB s\u1ebd \u0111\u1ecdc ghi v\u1edbi t\u1ec9 l\u1ec7 75%\/25%(3 l\u1ea7n \u0111\u1ecdc, 1 l\u1ea7n ghi) v\u1edbi 64 ti\u1ebfn tr\u00ecnh c\u00f9ng 1 l\u00fac. T\u1ec9 l\u1ec7 3:1 nh\u01b0 tr\u00ean g\u1ea7n gi\u1ed1ng nh\u01b0 c\u00e1ch \u0111\u1ecdc ghi c\u1ee7a c\u00e1c ph\u1ea7n m\u1ec1m database hi\u1ec7n t\u1ea1i.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>K\u1ebft qu\u1ea3 sau khi ki\u1ec3m tra xong:<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><em>vnsotest: (g=0): rw=randrw, bs=4K-4K\/4K-4K\/4K-4K, ioengine=libaio, iodepth=64<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> fio-2.15<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> Starting 1 process<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> vnsotest: Laying out IO file(s) (1 file(s) \/ 4096MB)<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> Jobs: 1 (f=1): [m(1)] [100.0% done] [62506KB\/21105KB\/0KB \/s] [15.7K\/5276\/0 iops] [eta 00m:00s]<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> vnsotest: (groupid=0, jobs=1): err= 0: pid=12219: Tue Dec 13 11:07:08 2016<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> read : io=3070.4MB, bw=74548KB\/s, <strong>iops=18636<\/strong>, runt= 42174msec<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> write: io=1025.8MB, bw=24904KB\/s, <strong>iops=6226<\/strong>, runt= 42174msec<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> cpu : usr=14.97%, sys=54.08%, ctx=201990, majf=0, minf=30<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=0.1%, &gt;=64=100.0%<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, &gt;=64=0.0%<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.1%, &gt;=64=0.0%<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> issued : total=r=785996\/w=262580\/d=0, short=r=0\/w=0\/d=0, drop=r=0\/w=0\/d=0<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> latency : target=0, window=0, percentile=100.00%, depth=64<\/em><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><em>Run status group 0 (all jobs):<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> READ: io=3070.4MB, aggrb=74547KB\/s, minb=74547KB\/s, maxb=74547KB\/s, mint=42174msec, maxt=42174msec<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> WRITE: io=1025.8MB, aggrb=24904KB\/s, minb=24904KB\/s, maxb=24904KB\/s, mint=42174msec, maxt=42174msec<\/em><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><em>Disk stats (read\/write):<\/em><\/span><br \/>\n<span style=\"color: #000000;\"><em> vda: ios=785123\/262319, merge=1\/3, ticks=1571425\/929520, in_queue=2500488, util=99.95%<\/em><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"http:\/\/docs.demo.vnso.vn\/wp-content\/uploads\/2016\/12\/Screenshot_5.png\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-420 size-full aligncenter\" src=\"http:\/\/docs.demo.vnso.vn\/wp-content\/uploads\/2016\/12\/Screenshot_5.png\" alt=\"screenshot_5\" width=\"1342\" height=\"348\" \/><\/a><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><em>(Click v\u00e0o h\u00ecnh \u0111\u1ec3 ph\u00f3ng to.)<\/em><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">Theo nh\u01b0 k\u1ebft qu\u1ea3 ki\u1ec3m tra VPS VNSO s\u1ebd l\u00e0:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\"><strong>18636 IOPS read<\/strong><\/span><\/li>\n<li><span style=\"color: #000000;\">\u00a0<strong>6226 IOPS write<\/strong><\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">Th\u00f4ng th\u01b0\u1eddng \u1ed5 c\u1ee9ng non-SSD c\u00f3 t\u1ed1c \u0111\u1ed9 IOPS \u0111\u1ecdc\/ghi ng\u1eabu nhi\u00ean l\u1ea7n l\u01b0\u1ee3t l\u00e0 500\/200.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">Ngo\u00e0i ra b\u1ea1n c\u00f3 th\u1ec3 ch\u1ec9 ki\u1ec3m tra ri\u00eang t\u1ed1c \u0111\u1ed9 \u0111\u1ecdc ghi ng\u1eabu nhi\u00ean v\u1edbi c\u00e1c c\u00e2u l\u1ec7nh b\u00ean d\u01b0\u1edbi:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>\u0110\u1ecdc ng\u1eabu nhi\u00ean:<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">[bash]<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">fio &#8211;randrepeat=1 &#8211;ioengine=libaio &#8211;direct=1 &#8211;gtod_reduce=1 &#8211;name=vnsotest &#8211;filename=vnsotest &#8211;bs=4k &#8211;iodepth=64 &#8211;size=4G &#8211;readwrite=randread<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">[\/bash]<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Ghi ng\u1eabu nhi\u00ean:<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">[bash]<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">fio &#8211;randrepeat=1 &#8211;ioengine=libaio &#8211;direct=1 &#8211;gtod_reduce=1 &#8211;name=vnsotest &#8211;filename=vnsotest &#8211;bs=4k &#8211;iodepth=64 &#8211;size=4G &#8211;readwrite=randwrite<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">[\/bash]<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">K\u1ebft qu\u1ea3 ki\u1ec3m tra tr\u00ean VPS VNSO:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"http:\/\/docs.demo.vnso.vn\/wp-content\/uploads\/2016\/12\/Screenshot_7.png\"><img decoding=\"async\" class=\"alignnone size-full wp-image-424\" src=\"http:\/\/docs.demo.vnso.vn\/wp-content\/uploads\/2016\/12\/Screenshot_7.png\" alt=\"screenshot_7\" width=\"1239\" height=\"305\" \/><\/a><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><em>(Click v\u00e0o h\u00ecnh \u0111\u1ec3 ph\u00f3ng to.)<\/em><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"http:\/\/docs.demo.vnso.vn\/wp-content\/uploads\/2016\/12\/Screenshot_6.png\"><img decoding=\"async\" class=\"alignnone size-full wp-image-423\" src=\"http:\/\/docs.demo.vnso.vn\/wp-content\/uploads\/2016\/12\/Screenshot_6.png\" alt=\"screenshot_6\" width=\"1255\" height=\"305\" \/><\/a><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><em>(Click v\u00e0o h\u00ecnh \u0111\u1ec3 ph\u00f3ng to.)<\/em><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>IOPS read:<\/strong> 26550<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>IOPS write:<\/strong> 7626<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>L\u01b0u \u00fd:<\/strong> Th\u00f4ng s\u1ed1 RAM v\u00e0 CPU c\u00f3 \u1ea3nh h\u01b0\u1edfng t\u1edbi t\u1ed1c \u0111\u1ed9 IOPS \u0111\u1ecdc ghi. <a style=\"color: #000000;\" href=\"https:\/\/vnso.vn\/en\/\">CPU v\u00e0 RAM<\/a> cao s\u1ebd cho k\u1ebft qu\u1ea3 IOPS t\u1ed1t h\u01a1n.<\/span><\/p>\n<p style=\"text-align: justify;\">","protected":false},"excerpt":{"rendered":"<p>G\u1ea7n \u0111\u00e2y VNSO nh\u1eadn \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u ph\u1ea3n h\u1ed3i t\u1eeb kh\u00e1ch h\u00e0ng ph\u00e0n n\u00e0n v\u1ec1 vi\u1ec7c \u1ed5 c\u1ee9ng kh\u00f4ng \u0111\u00fang \u1ed5 SSD. Tuy nhi\u00ean c\u00e1ch \u00a0ki\u1ec3m tra ch\u01b0a \u0111\u00fang. \u0110a s\u1ed1 kh\u00e1ch h\u00e0ng s\u1ebd s\u1eed d\u1ee5ng l\u1ec7nh dd \u0111\u1ec3 ki\u1ec3m tra t\u1ed1c \u0111\u1ed9 \u1ed5 c\u1ee9ng, c\u00e2u l\u1ec7nh ph\u1ed5 bi\u1ebfn nh\u01b0 sau:<\/p>","protected":false},"author":1,"featured_media":10798,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[206,21,17],"tags":[23,105],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.3 (Yoast SEO v22.8) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>H\u01b0\u1edbng d\u1eabn ki\u1ec3m tra t\u1ed1c \u0111\u1ed9 \u1ed5 c\u1ee9ng SSD<\/title>\n<meta name=\"description\" content=\"G\u1ea7n \u0111\u00e2y VNSO nh\u1eadn \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u ph\u1ea3n h\u1ed3i t\u1eeb kh\u00e1ch h\u00e0ng ph\u00e0n n\u00e0n v\u1ec1 vi\u1ec7c \u1ed5 c\u1ee9ng kh\u00f4ng \u0111\u00fang \u1ed5 SSD. 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