Well it has been 6 days running my 957RX on the SCSI2SD card. So far so good. Runs just the same as before. The system does not see much activity since it's for old data only and once in a while someone logs on. I have ftp and samba running. Also Materials Management 3000 has it monitor and processes running with databases opened. I started a self streaming job to bang on it for a while with a database unload to disk and a file copy. I let that run for a day. Here are my specifics.
I have a 16GB Kingston SD card in the device. I configured 2 LUNs on the card. One of 2GB, because this is what I have on the array and I wasn't sure of the maximum for LDEV 1, whether the limit as 2 or 4 GB. The second, LDEV 2 is 9GB. Here is a listing. I picked different IDs so they wouldn't look the same. I don't think it matters much.
Sysgen -> IO
     io> ld 1/2
 LDEV:     1  DEVNAME:                    OUTDEV:        0   MODE:             
   ID: ST32272N                           RSIZE:       128   DEVTYPE: DISC     
 PATH: 52.4.0                             MPETYPE:       4   MPESUBTYPE:  2    
CLASS: DISC     SPOOL                                                          
                                                                               
 LDEV:     2  DEVNAME:                    OUTDEV:        0   MODE:             
   ID: ST34572N                           RSIZE:       128   DEVTYPE: DISC     
 PATH: 52.5.0                             MPETYPE:       4   MPESUBTYPE:  2    
CLASS: DISC     SPOOL                                                          

Manager.Sys:dstat all
   LDEV-TYPE    STATUS      VOLUME (VOLUME SET - GEN)
  ----------   --------    --------------------------
  1-SCSI2SD     MASTER      MEMBER1         (MPEXL_SYSTEM_VOLUME_SET-0)
  2-SCSI2SD     MEMBER      MEMBER2         (MPEXL_SYSTEM_VOLUME_SET-0)
Manager.Sys:DISCFREE B
DISCFREE A.50.01 Copyright (C) Hewlett-Packard 1992.  All rights reserved.
                         WED, DEC 12, 2018,  3:04 PM
ALL MEASUREMENTS ARE IN SECTORS.
-------------------------------------------------------------------------------
LDEV :     1 -- (MPEXL_SYSTEM_VOLUME_SET:MEMBER1)
          DEVICE SIZE :    8388592
          TRANS SPACE :     343424               PERM SPACE :    5440096
      MAX TRANS SPACE :    6291408           MAX PERM SPACE :    6291408
           FREE SPACE :    2605072
 AVAIL TO TRANS SPACE :    2605072      AVAIL TO PERM SPACE :     851312
-------------------------------------------------------------------------------
LDEV :     2 -- (MPEXL_SYSTEM_VOLUME_SET:MEMBER2)
          DEVICE SIZE :   37748720
          TRANS SPACE :     218800               PERM SPACE :   25995552
      MAX TRANS SPACE :   32086416           MAX PERM SPACE :   32086416
           FREE SPACE :   11534368
 AVAIL TO TRANS SPACE :   11534368      AVAIL TO PERM SPACE :    6090864
-------------------------------------------------------------------------------
TOTALS (IN SECTORS):
          DEVICE SIZE :   46137312
          TRANS SPACE :     562224               PERM SPACE :   31435648
      MAX TRANS SPACE :   38377824           MAX PERM SPACE :   38377824
           FREE SPACE :   14139440
 AVAIL TO TRANS SPACE :   14139440      AVAIL TO PERM SPACE :    6942176

You can see from these listings what I have for space and what's being used.
Total Space = 46137312 x 256 = 11,811,151,872 Bytes
Free  Space = 14139440 x 256 = 3,619,696,640 Bytes
Used  Space = 31997872 x 256 = 8,191,455,232 Bytes

So, any questions?

John Zoltak
Fives North American Combustion
Cleveland Ohio

P.S. The SCSI2SD is running from the termination power on the SCSI cable.
It is a sight to behold.

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