The host: a R5K/180 Indy.
Note: the Indy and scsi2sd required a terminator on the external scsi port. I don't normally leave one there, but the system would hang and crash without it.
The adapter: SCSI2SD v6.
SCSI2 turned on. Parity turned on. Set to 10MB/sync. 2GB allocated in the scsi2sd-util. FYI, you definitely need to have an SD card inserted for anything to work.
The SD card: Sandisk Extreme 128GB (this is A2 rated which is supposed to help with small random reads/writes)
The results.
Dismal. Comparatively there is a 300GB/10K drive that does this on the same bus (not at the same time of course)
Conclusion: I will probably have to deal with the noise.
Note: the Indy and scsi2sd required a terminator on the external scsi port. I don't normally leave one there, but the system would hang and crash without it.
The adapter: SCSI2SD v6.
SCSI2 turned on. Parity turned on. Set to 10MB/sync. 2GB allocated in the scsi2sd-util. FYI, you definitely need to have an SD card inserted for anything to work.
The SD card: Sandisk Extreme 128GB (this is A2 rated which is supposed to help with small random reads/writes)
The results.
Code:
# diskperf -W -n scsi2sd_10M_Sync -c 1G -t 60 /mnt/testpath
#---------------------------------------------------------
# Disk Performance Test Results Generated By Diskperf V1.2
#
# Test name : scsi2sd_10M_Sync
# Test date : Sat Dec 14 12:20:45 2019
# Test machine : IRIX isengard 6.5 10070055 IP22
# Test type : XFS data subvolume
# Test path : /mnt/testpath
# Request sizes : min=4096 max=4194304
# Parameters : direct=0 time=60 scale=1.000 delay=0.000
# XFS file size : 1073741824 bytes
#---------------------------------------------------------
# req_size fwd_wt fwd_rd bwd_wt bwd_rd rnd_wt rnd_rd
# (bytes) (MB/s) (MB/s) (MB/s) (MB/s) (MB/s) (MB/s)
#---------------------------------------------------------
4096 1.26 3.31 1.41 3.28 0.09 0.15
8192 1.38 3.61 1.27 3.13 0.17 0.29
16384 1.41 3.61 1.28 3.14 0.34 0.59
32768 1.38 3.62 1.28 3.14 0.68 1.12
65536 4.46 1.19 3.60 3.84 2.99 1.47
131072 4.48 1.57 3.47 3.93 2.61 2.34
262144 4.49 1.93 3.20 3.69 3.39 1.88
524288 4.49 2.15 2.95 3.51 2.98 2.19
1048576 4.50 2.19 2.94 3.47 3.24 1.20
Code:
# diskperf -W -n 300G_10K_SGI_Indy -c 128M -t 10 /tmp/testpath
#---------------------------------------------------------
# Disk Performance Test Results Generated By Diskperf V1.2
#
# Test name : 300G_10K_SGI_Indy
# Test date : Sat Dec 14 13:53:04 2019
# Test machine : IRIX isengard 6.5 10070055 IP22
# Test type : XFS data subvolume
# Test path : /tmp/testpath
# Request sizes : min=4096 max=4194304
# Parameters : direct=0 time=10 scale=1.000 delay=0.000
# XFS file size : 134217728 bytes
#---------------------------------------------------------
# req_size fwd_wt fwd_rd bwd_wt bwd_rd rnd_wt rnd_rd
# (bytes) (MB/s) (MB/s) (MB/s) (MB/s) (MB/s) (MB/s)
#---------------------------------------------------------
4096 16.22 13.13 15.82 4.09 0.01 17.52
8192 17.00 1.30 13.63 5.66 0.00 20.44
16384 13.77 13.41 20.61 4.20 0.76 24.40
32768 14.03 13.44 21.23 4.25 2.12 24.35
65536 15.78 12.97 17.80 4.08 1.26 28.79
131072 16.84 13.27 17.07 3.18 12.16 27.01
262144 13.70 11.72 16.02 4.54 17.24 25.63
524288 12.88 15.86 16.86 5.83 14.97 24.19
1048576 14.46 12.13 15.55 10.01 11.39 23.87
2097152 14.23 12.73 16.99 11.34 13.97 24.01
4194304 14.07 10.86 13.46 14.61 16.69 18.73