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낮 0: The Storage Array Is at 92 Percent. Procurement Approves the PO.

월요일, 09:00. The monitoring dashboard shows your VMware datastore at 92 percent capacity. Growth rate is 2 percent per week. You have four weeks before the array hits 100 percent. The PO for additional storage is approved by 14:00. The drives need to be in the rack and serving data by Friday.

낮 1: Solidigm P5520 7.68TB drives arrive. These are PCIe 4.0 NVMe read-intensive SSDs rated at 1 DWPD with 144-layer 3D NAND. For a VMware datastore that is 80 percent reads, read-intensive is exactly the right endurance tier.

낮 2: Drives installed. RAID 10 configured across 8 드라이브. 30.7 TB usable. vMotion migration begins at 2.4 GB/초.

낮 3: Migration complete. Datastore utilization drops from 92 에게 58 percent. Latency at 82 microseconds. No incident ticket was filed.

기술 사양

매개변수	사양
용량	7.68결핵 (also: 1.92결핵, 3.84결핵, 15.36결핵)
폼 팩터	2.5-인치 U.2 (15mm)
인터페이스	PCIe 4.0 x4, NVMe 1.4
NAND Type	Solidigm 144-layer 3D TLC
순차적 읽기 (128케이)	까지 7,000 MB/s
순차적 쓰기 (128케이)	까지 4,200 MB/s
무작위 읽기 (4케이, QD256)	Up to 1,000K IOPS
무작위 쓰기 (4케이, QD256)	Up to 130K IOPS
숨어 있음 (4K Random Read, QD1)	~82 microseconds
숨어 있음 (4K Random Write, QD1)	~15 microseconds
지구력	1 DWPD (5 연령), 14,016 TBW
MTBF	2,000,000 시간
힘 (Idle / Active)	5승 / 18승
전력 손실 보호	Capacitor-backed
보안	TCG 오팔 2.0, SED, FIPS 140-2, secure erase
온도	0C to 70C
보증	5-년도 (manufacturer)

P5520 vs P5620

특징	P5520	P5620
지구력	1 DWPD	3 DWPD
무작위 쓰기 IOPS	130케이	290케이
Write Latency	15 us	11 us
Best for	CDN, streaming, VM웨어, boot	OLTP logging, 캐싱, tempdb
가격	100%	~130%

Three Rules for Read-Intensive SSDs

1. Monitor actual DWPD. ~에 0.2 DWPD, the drive outlasts its warranty 5x. ~에 0.9 DWPD, it hits its limit in 5.5 연령. Use iDRAC/iBMC telemetry.

2. RAID 10 for virtualization, RAID 5 for read-mostly. VMware hosts benefit from RAID 10 write speed. CDN nodes at 90 percent reads can use RAID 5.

3. Over-provisioning is built in. Format at full capacity. Factory over-provisioning handles wear leveling.