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-rw-r--r--docs/ENVIRONMENT.md11
1 files changed, 11 insertions, 0 deletions
diff --git a/docs/ENVIRONMENT.md b/docs/ENVIRONMENT.md
index 56e79b9384..534490e0e0 100644
--- a/docs/ENVIRONMENT.md
+++ b/docs/ENVIRONMENT.md
@@ -583,3 +583,14 @@ SYSTEMD_HOME_DEBUG_SUFFIX=foo \
* `$SYSTEMD_FIREWALL_BACKEND` – takes a string, either `iptables` or
`nftables`. Selects the firewall backend to use. If not specified tries to
use `nftables` and falls back to `iptables` if that's not available.
+
+`systemd-storagetm`:
+
+* `$SYSTEMD_NVME_MODEL`, `$SYSTEMD_NVME_FIRMWARE`, `$SYSTEMD_NVME_SERIAL`,
+ `$SYSTEMD_NVME_UUID` – these take a model string, firmware version string,
+ serial number string, and UUID formatted as string. If specified these
+ override the defaults exposed on the NVME subsystem and namespace, which are
+ derived from the underlying block device and system identity. Do not set the
+ latter two via the environment variable unless `systemd-storagetm` is invoked
+ to expose a single device only, since those identifiers better should be kept
+ unique.