Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Device | Type | IOPS | Interface | Notes |
| --- | --- | --- | --- | --- |
| Simple SLC SSD | SSD | ~400 IOPS[citation needed] | SATA 3 Gbit/s |  |
| Intel X25-M G2 (MLC) | SSD | ~8,600 IOPS | SATA 3 Gbit/s | Intel's data sheet claims 6,600/8,600 IOPS (80 GB/160 GB version) and 35,000 IOPS for random 4 KB writes and reads, respectively. |
| Intel X25-E (SLC) | SSD | ~5,000 IOPS | SATA 3 Gbit/s | Intel's data sheet claims 3,300 IOPS and 35,000 IOPS for writes and reads, respectively. 5,000 IOPS are measured for a mix. Intel X25-E G1 has around 3 times higher IOPS compared to the Intel X25-M G2. |
| G.Skill Phoenix Pro | SSD | ~20,000 IOPS | SATA 3 Gbit/s | SandForce-1200 based SSD drives with enhanced firmware, states up to 50,000 IOPS, but benchmarking shows for this particular drive ~25,000 IOPS for random read and ~15,000 IOPS for random write. |
| OCZ Vertex 3 | SSD | Up to 60,000 IOPS | SATA 6 Gbit/s | Random Write 4 KB (Aligned) |
| Corsair Force Series GT | SSD | Up to 85,000 IOPS | SATA 6 Gbit/s | 240 GB Drive, 555 MB/s sequential read & 525 MB/s sequential write, Random Write 4 KB Test (Aligned) |
| OCZ Vertex 4 | SSD | Up to 120,000 IOPS | SATA 6 Gbit/s | 256 GB Drive, 560 MB/s sequential read & 510 MB/s sequential write, Random Read 4 KB Test 90K IOPS, Random Write 4 KB Test 85K IOPS |
| Texas Memory Systems RamSan-20 | SSD | 120,000+ Random Read/Write IOPS | PCIe | Includes RAM cache |
| Fusion-io ioDrive | SSD | 140,000 Read IOPS, 135,000 Write IOPS | PCIe |  |
| Virident Systems tachIOn | SSD | 320,000 sustained READ IOPS using 4KB blocks and 200,000 sustained WRITE IOPS using 4KB blocks | PCIe |  |
| OCZ RevoDrive 3 X2 | SSD | 200,000 Random Write 4K IOPS | PCIe |  |
| Fusion-io ioDrive Duo | SSD | 250,000+ IOPS | PCIe |  |
| Violin Memory Violin 3200 | SSD | 250,000+ Random Read/Write IOPS | PCIe /FC/Infiniband/iSCSI | Flash Memory Array |
| WHIPTAIL, ACCELA | SSD | 250,000/200,000+ Write/Read IOPS | Fibre Channel, iSCSI, Infiniband/SRP, NFS, CIFS | Flash Based Storage Array |
| DDRdrive X1, | SSD | 300,000+ (512B Random Read IOPS) and 200,000+ (512B Random Write IOPS) | PCIe |  |
| SolidFire SF3010/SF6010 | SSD | 250,000 4KB Read/Write IOPS | iSCSI | Flash Based Storage Array (5RU) |
| Texas Memory Systems RamSan-720 Appliance | SSD | 500,000 Optimal Read, 250,000 Optimal Write 4KB IOPS | FC / InfiniBand |  |
| OCZ Single SuperScale Z-Drive R4 PCI-Express SSD | SSD | Up to 500,000 IOPS | PCIe |  |
| WHIPTAIL, INVICTA | SSD | 650,000/550,000+ Read/Write IOPS | Fibre Channel, iSCSI, Infiniband/SRP, NFS | Flash Based Storage Array |
| Violin Memory Violin 6000 | 3RU Flash Memory Array | 1,000,000+ Random Read/Write IOPS | /FC/Infiniband/10Gb(iSCSI)/ PCIe |  |
| Texas Memory Systems RamSan-630 Appliance | SSD | 1,000,000+ 4KB Random Read/Write IOPS | FC / InfiniBand |  |
| Fusion-io ioDrive Octal (single PCI Express card) | SSD | 1,180,000+ Random Read/Write IOPS | PCIe |  |
| OCZ 2x SuperScale Z-Drive R4 PCI-Express SSD | SSD | Up to 1,200,000 IOPS | PCIe |  |
| Texas Memory Systems RamSan-70 | SSD | 1,200,000 Random Read/Write IOPS | PCIe | Includes RAM cache |
| Kaminario K2 | Flash/DRAM/Hybrid SSD | Up to 1,200,000 IOPS SPC-1 IOPS with the K2-D (DRAM) | FC |  |
| NetApp FAS6240 cluster | Flash/Disk | 1,261,145 SPECsfs2008 nfsv3 IOPs using disks with virtual storage tiering. | NFS, CIFS, FC, FCoE, iSCSI | SPECsfs2008 is the latest version of the Standard Performance Evaluation Corporation benchmark suite measuring file server throughput and response time, providing a standardized method for comparing performance across different vendor platforms. http://www.spec.org/sfs2008/ |
| Fusion-io ioDrive2 | SSD | Up to 9,608,000 IOPS | PCIe |  |
Question:
how many devices have no notes?
Answer:
14