Unless it is your aim to replicate the IIci's condition ex factory, dinna fash yesel' about the present HDD. Just get any other 50-pin SCSI drive, up to 2-4GB, from the last 10-15 years. A larger drive will perhaps need multiple partitions so that the fixed (under HFS) total number of blocks per 'volume' does not result in ridiculously wasteful use of storage capacity.
Your resuscitation project is likely to meet far more significant problems than an antediluvian hard drive, such as bad 5V TRKL supply (controls softpower startup and software-controlled shutdown) from the PSU, so spare yourself for more testing trials.
The IIci is a fine machine (I have three), running smartly up to OS 7.6.1, and profiting greatly from added DayStar PowerCache (up to 50MHz) or Turbo 040 (up to 40MHz) processor upgrades, so best of fortune in your project.
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Your resuscitation project is likely to meet far more significant problems than an antediluvian hard drive, such as bad 5V TRKL supply (controls softpower startup and software-controlled shutdown) from the PSU, so spare yourself for more testing trials.
The IIci is a fine machine (I have three), running smartly up to OS 7.6.1, and profiting greatly from added DayStar PowerCache (up to 50MHz) or Turbo 040 (up to 40MHz) processor upgrades, so best of fortune in your project.
de