Essence_of_War
Platinum Member
I recently added an internal data drive to my work computer: an E8400 w/ 16 GB DDR2, an older 500 GB Seagate ST3500620AS (OS, apps) and a new 2 TB Seagate ST2000DM001 (data).
Before adding the data drive, the old drive was ~80% full. I noticed that when I was moving the data to the new data drive that transfer rates were quite sluggish, ~20-30 MB/s.
After all of the transfers and finishing image snapshots of both drives for back-up purposes, I ran an aja disktest on both drives to investigate that transfer bottleneck:
Old Drive (~20% full at disktest) (500 GB Seagate ST3500620AS)
Write: 77.5 MB/s
Read: 93.6 MB/s
New Drive (~15% full at disktest) (2 TB Seagate ST2000DM001)
Write: 202.1 MB/s
Read: 197.9 MB/s
The numbers for the older drive look fairly reasonable. Is it safe to assume that the bottleneck that I saw during data transfer was due mostly to the fact that the older drive was nearly full? Or perhaps due to the transfer not being fully sequential? I suppose all it takes is a handful of slow random reads to crush the average transfer rate...
Before adding the data drive, the old drive was ~80% full. I noticed that when I was moving the data to the new data drive that transfer rates were quite sluggish, ~20-30 MB/s.
After all of the transfers and finishing image snapshots of both drives for back-up purposes, I ran an aja disktest on both drives to investigate that transfer bottleneck:
Old Drive (~20% full at disktest) (500 GB Seagate ST3500620AS)
Write: 77.5 MB/s
Read: 93.6 MB/s
New Drive (~15% full at disktest) (2 TB Seagate ST2000DM001)
Write: 202.1 MB/s
Read: 197.9 MB/s
The numbers for the older drive look fairly reasonable. Is it safe to assume that the bottleneck that I saw during data transfer was due mostly to the fact that the older drive was nearly full? Or perhaps due to the transfer not being fully sequential? I suppose all it takes is a handful of slow random reads to crush the average transfer rate...
