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Day 0: The Storage Array Is at 92 Percent. Procurement Approves the PO.
Segunda-feira, 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.
Day 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.
Day 2: Drives installed. ATAQUE 10 configured across 8 drives. 30.7 TB usable. vMotion migration begins at 2.4 GB/s.
Day 3: Migration complete. Datastore utilization drops from 92 para 58 percent. Latency at 82 microseconds. No incident ticket was filed.
Especificações técnicas
| Parâmetro | Especificação |
|---|---|
| Capacidade | 7.68tb (also: 1.92tb, 3.84tb, 15.36tb) |
| Fator de forma | 2.5-polegada U.2 (15milímetros) |
| Interface | PCIe 4.0 x4, NVMe 1.4 |
| NAND Type | Solidigm 144-layer 3D TLC |
| Leitura sequencial (128K) | Até 7,000 Mb/s |
| Gravação sequencial (128K) | Até 4,200 Mb/s |
| Leitura aleatória (4K, QD256) | Up to 1,000K IOPS |
| Gravação Aleatória (4K, QD256) | Up to 130K IOPS |
| Latência (4K Random Read, QD1) | ~82 microseconds |
| Latência (4K Random Write, QD1) | ~15 microseconds |
| Resistência | 1 DWPD (5 years), 14,016 A confirmar |
| MTBF | 2,000,000 horas |
| Poder (Idle / Active) | 5C / 18C |
| Power Loss Protection | Capacitor-backed |
| Segurança | TCG Opal 2.0, SED, FIPS 140-2, secure erase |
| Temperature | 0C to 70C |
| Garantia | 5-year (manufacturer) |
P5520 vs P5620
| Recurso | P5520 | P5620 |
|---|---|---|
| Resistência | 1 DWPD | 3 DWPD |
| Random Write IOPS | 130K | 290K |
| Write Latency | 15 us | 11 us |
| Best for | CDN, streaming, VMware, boot | OLTP logging, cache, tempdb |
| Price | 100% | ~130% |
Three Rules for Read-Intensive SSDs
1. Monitor actual DWPD. At 0.2 DWPD, the drive outlasts its warranty 5x. At 0.9 DWPD, it hits its limit in 5.5 years. Use iDRAC/iBMC telemetry.
2. ATAQUE 10 for virtualization, ATAQUE 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.
Compatible Platforms
U.2 NVMe. Dell R660/R760/R770/R860/R960, xFusion V7, Lenovo V3/V4. PERC H755N/H965i.
Source Through Xincuan
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