在尝试将TiDB部署在单机系统上时，发现当TiKV的data目录为zfs时，tikv启动会报错，同样配置文件，放到ext4或者xfs时就正常。zfs报错内容为：
failed to open raft engine: Other("[components/raft_log_engine/src/engine.rs:464]: IO Error: fallocate")] [backtrace= 0: tikv_util::set_panic_hook::{{closure}}
at /home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tikv/components/tikv_util/src/lib.rs:490:18
1: std::panicking::rust_panic_with_hook
at /rust/toolchains/nightly-2022-02-14-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/panicking.rs:702:17
2: std::panicking::begin_panic_handler::{{closure}}
at /rust/toolchains/nightly-2022-02-14-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/panicking.rs:588:13
3: std::sys_common::backtrace::__rust_end_short_backtrace
at /rust/toolchains/nightly-2022-02-14-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys_common/backtrace.rs:138:18
4: rust_begin_unwind
at /rust/toolchains/nightly-2022-02-14-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/panicking.rs:584:5
5: core::panicking::panic_fmt
at /rust/toolchains/nightly-2022-02-14-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/panicking.rs:143:14
6: core::result::unwrap_failed
at /rust/toolchains/nightly-2022-02-14-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/result.rs:1749:5
7: core::result::Result<T,E>::expect
at /rust/toolchains/nightly-2022-02-14-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/result.rs:1022:23
<raft_log_engine::engine::RaftLogEngine as server::server::ConfiguredRaftEngine>::build
at /home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tikv/components/server/src/server.rs:1434:13
server::server::TiKvServer<CER>::init_raw_engines
at /home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tikv/components/server/src/server.rs:1468:27
8: server::server::run_impl
at /home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tikv/components/server/src/server.rs:129:35
server::server::run_tikv
at /home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tikv/components/server/src/server.rs:163:5
9: tikv_server::main
at /home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tikv/cmd/tikv-server/src/main.rs:189:5
10: core::ops::function::FnOnce::call_once
at /rust/toolchains/nightly-2022-02-14-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/function.rs:227:5
std::sys_common::backtrace::__rust_begin_short_backtrace
at /rust/toolchains/nightly-2022-02-14-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys_common/backtrace.rs:122:18
11: main
12: __libc_start_main
13: <unknown>