ADATA SU800 256GB 3D NAND Flash SSD Test & Review

I keep reading these drives are slower, but they are cheap and still SSD and work very fast for my needs.

As you can see the sequential read is 481-491MB/s, if I put them in MDADM RAID10 mode (normal RAID1) they should give me well over 900MB/s and with redundancy and being very cheap for what they offer.

[1232206.315622] scsi 8:0:1:0: Direct-Access     ATA      ADATA SU800      1A   PQ: 0 ANSI: 6
[1232206.315649] scsi 8:0:1:0: SATA: handle(0x000a), sas_addr(0x4433221105000000), phy(5), device_name(0x0000000000000000)
[1232206.315657] scsi 8:0:1:0: SATA: enclosure_logical_id(0x500605b0079b94b0), slot(5)
[1232206.315764] scsi 8:0:1:0: atapi(n), ncq(y), asyn_notify(n), smart(y), fua(y), sw_preserve(y)
[1232206.315773] scsi 8:0:1:0: qdepth(32), tagged(1), simple(0), ordered(0), scsi_level(7), cmd_que(1)
[1232206.316834] sd 8:0:1:0: [sdj] 500118192 512-byte logical blocks: (256 GB/238 GiB)
[1232206.316849] sd 8:0:1:0: [sdj] 4096-byte physical blocks
[1232206.316948] sd 8:0:1:0: Attached scsi generic sg8 type 0
[1232206.319196] sd 8:0:1:0: [sdj] Write Protect is off
[1232206.319209] sd 8:0:1:0: [sdj] Mode Sense: 7f 00 10 08
[1232206.319452] sd 8:0:1:0: [sdj] Write cache: enabled, read cache: enabled, supports DPO and FUA
[1232206.323356]  sdj: unknown partition table
[1232206.326505] sd 8:0:1:0: [sdj] Attached SCSI disk

homebox user # dd if=/dev/sdj of=/dev/null bs=1M count=10000
10000+0 records in
10000+0 records out
10485760000 bytes (10 GB) copied, 21.3731 s, 491 MB/s

homebox user # dd if=/dev/sdk of=/dev/null bs=1M count=10000
10000+0 records in
10000+0 records out
10485760000 bytes (10 GB) copied, 21.7838 s, 481 MB/s


adata, su, gb, nand, ssd, reviewi, slower, sequential, mb, mdadm, raid, mode, redundancy, scsi, ata, pq, ansi, sata, sas_addr, phy, device_name, enclosure_logical_id, slot, atapi, ncq, asyn_notify, fua, sw_preserve, qdepth, tagged, scsi_level, cmd_que, sdj, byte, gib, generic, sg, cache, enabled, supports, dpo, partition, disk, homebox, user, dd, dev, null, bs, bytes, copied, sdk,

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