Will SSD Replace HDD?

Will SSD replace HDD?

SSD vs HDDHDD the workhorse of data storage The battle for storage has beengoing on for decades with harddisk drives (HDD) dominatingbecause of cost and capacity‒ Tier 0 is Flash or SSD‒ Tier 1 is Latency HDD‒ Tier 2 is Capacity HDD‒ Tier 3 is tape of virtual tape Solid State Disk (SSD) hasmade incredible gains over thelast decade to challenge HDD‒ Some analysts predict a quickdemise of disk drives SOURCE: HGST Let’s investigate2

Two Drive TypesHDD have only moving parts in compute chain besides cooling Hard Disk Drives (HDD) arethe workhorse of data storage Solid State Drives are touted asthe revolutionary technology toreplaced HDD3

Ways to Compare SSD and HDD Capacity Cost Throughput IOPs Latency Market Share4

HDD CapacityCapacity Drives often 3.5” while Latency Drives are 2.5” HDD Capacity is determinedby the Capacity/disk and thenumber of disks3 disks visible HDD can hold up to 10 disks,but usually a few disks Each 2.5” disk can support upto 1TB1 Record currently is 10TB 20TB HDD by 20202 OURCE: 1. PLATTER-AT-1TB/ . ML5

Flash Chip CapacityDoubling Capacity Every Couple Years 3D NAND technologydoubling capacity tosurpass HDD148 layer SSD Chipnow in development248 Layer3D NAND1000Flash Chip Capacity (GB) 1. rwrite-speeds2. mmit-2015/ 2020 100GB?1001020061GB2005512MB10.120102008 8GB4GB20152013 32GB16GB2003128MB20009/17/2015201020206

SSD Capacity Record SSD Capacity is determined bythe Capacity/die and thenumber of die SSD can hold up to 500 die114 chips visibleMultiple die/chipUp to 500 die/SSD Each die can support up to32GB1 Record currently is 8TB 16TB HDD in 20161 Surpassing HDD Capacity nextyear! OURCE: 1. VE//7

Capacity and Cost Comparison While SSD is setting recordsfor capacity, most HDD havesignificantly higher capacitythan SSD Multi-Terabyte HDD readilyavailable Most SSD under 1TB becauseof cost, but that could changewith 32GB dies becomingcommon next year‒ 20 32GB chips would give youa 6.4TB SSD Amazon search:SSDHDD120GB 48 20250GB 98 22500GB 165 491TB 345 532TB 794TB 135 Where is cost going?8

IDC Analysis The 40/limit hasbeen broken – seeprevious slide SSD is on trajectoryto dominate lowcapacityapplications9

Wikibon Analysis TCO could belower withNAND Flash AllFlash Arrays(AFA) if youconsider thepower savingsandperformancegains due toFlash Flash doesn’tneed to belimited to SSD ECTURES/10

Throughput ComparisonLarge File Test – Read Write Average Test HDD up to 262 MB/s (2 Gb/s) SSD up to 625MB/s (5 015-buying-guide-and-allthe-top-picks11

Performance SSD and AFA Intel is delivering up to 2.8 GB/s or 22.4 Gb/s ona PCIe SSD1 . DRIVES/SOLID-STATE-DRIVES-DC-P3700SERIES.HTML12

IOPS and Latency Comparison Disk Drive performance is oftenmeasured in Input/OutputOperations Per Second (IOPS) Latency is a key factor thataffects IOPS SSD and All Flash Arrays(AFAs) really shine in the IOPScategory‒ Seek Latency‒ Rotational LatencyHDDSSDAFAIOPS100s1,000s atency2-7 mS0mS0mS HTTPS://EN.WIKIPEDIA.ORG/WIKI/IOPS TTPS://EN.WIKIPEDIA.ORG/WIKI/HARD DISK DRIVE PERFORMANHCE CHARACTERISTICS13

Wikibon Analysis Wikibon expects Flash totake over most latencymarket storage applicationsover the next few years Capacity storage (target ofthis study group) isexpected to be dominatedby HDD through 2020 SOURCE: APACITY-STORAGE/14

Capacity Storage Close-up50% Crossoverpoint in 2020 IONERS/15

SSD for Performance, not Capacity SSD is making great strides in capacity improvementsCost/GB still significantly higher for SSD and this studygroup is targeting capacity markets (low cost/GB)HDD should have significant cold storage market sharefor next several years but it is in a declining market

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Two Drive Types HDD have only moving parts in compute chain besides cooling Hard Disk Drives (HDD) are the workhorse of data storage Solid State Drives are